US 027852

Analysis of US Patent 027852

As of April 28, 2026, a search for U.S. Patent number 027852 in the United States Patent and Trademark Office (USPTO) database and the dockets of the Court of Appeals for the Federal Circuit (CAFC) for 2026 did not yield a matching utility patent. The number "027852" does not conform to standard modern or historical USPTO utility patent numbering conventions.

It is possible that this number corresponds to a different type of patent (e.g., a design patent, though formatting is still atypical) or contains a typographical error. Searches for similar numbers have revealed patents related to coronaviruses, but these are distinct from the requested patent number. For instance, U.S. Patent 7,220,852 B1, titled "Coronavirus isolated from humans," was issued on May 22, 2007. Additionally, U.S. Patent Application Publication No. 2006/0257852 A1, titled "Severe acute respiratory syndrome coronavirus," was published on November 16, 2006.

A document with the number 27852 was found in the Federal Register (86 FR 27852), related to a "Prospective Grant of an Exclusive Patent License" for "Methods and Compositions for Adoptive Cell Therapy." However, this is a notice and not a granted patent.

Given the literal interpretation of the patent number as requested, no responsive patent, and therefore no associated title, assignee, inventors, dates, abstract, or claims, can be provided. No litigation records for a patent with this number were found in the CAFC dockets for 2026. If "027852" is a valid identifier for a specific intellectual property right, it may not be a U.S. utility patent.

Litigation Search for US Patent 027852

As of April 29, 2026, a comprehensive search of patent litigation databases and federal court dockets reveals no known litigation involving a U.S. Patent with the number 027852.

This result aligns with the "Patent Summary" section generated on April 28, 2026, which concluded that U.S. Patent 027852 does not conform to the numbering conventions for a U.S. utility or design patent. For a patent to be the subject of litigation, it must first be a validly issued patent.

Searches were conducted using the literal identifier "027852" in publicly accessible litigation resources, including the Public Access to Court Electronic Records (PACER) system, the U.S. Court of Appeals for the Federal Circuit (CAFC) dockets, and third-party patent litigation databases. These searches yielded no responsive results for a patent with this number.

While the number "027852" appears in other contexts within patent-related documents, these are not instances of a U.S. patent with this number being litigated:

• An application number US07/027,852, filed in 1987, corresponds to the now-expired U.S. Patent 4,826,810.
• A provisional application, 63/027,852, is cited as a priority document for a different patent application.
• A Canadian patent application has the number 2017/027852.

These are distinct identifiers and do not refer to an issued U.S. Patent 027852. Therefore, no litigation history can be provided because the subject patent does not appear to exist.

Proceedings overview

As of May 30, 2026, there are no known AIA trial proceedings on file for U.S. Patent 027852. This aligns with the consistent findings across all previously generated sections of this patent analysis, which indicate that U.S. Patent 027852 does not exist as an issued U.S. utility or design patent in the records of the United States Patent and Trademark Office (USPTO). Consequently, there are no active, concluded, or settled PTAB proceedings, nor any claims invalidated or sustained. This means there is no defensive posture provided by PTAB trials for this specific patent number, as the patent itself is not found in public records.

For each proceeding (most-impactful first — claims-invalidated ones go to the top):

No PTAB Proceedings Found for US Patent 027852

• Type: Not applicable.
• Filed: Not applicable.
• Status: No proceedings found.
• Judge panel: Not applicable.
• Petition grounds: Not applicable.
• Institution decision: Not applicable.
• Final Written Decision (if issued): Not applicable.
• Settlement / termination: Not applicable.
• Appeal: Not applicable.
• Defensive value: As U.S. Patent 027852 does not appear to exist as a validly issued patent, there are no PTAB proceedings to consider for defensive value.

Strategic summary

Given that U.S. Patent 027852 cannot be located in public patent records and, therefore, has no associated claims, it is impossible to provide a strategic summary regarding PTAB proceedings. No claims of 027852 are CANCELED, SUSTAINED, or UNTESTED through PTAB trials because the patent itself is not found to exist. Similarly, the concept of estoppel under 35 U.S.C. § 315(e)(2) does not apply, as there have been no petitioners or trial proceedings to create an estoppel landscape. There are no patterns of filings, appeals, or involvement of defensive aggregators to report. The absence of PTAB activity is a direct consequence of the non-existence of the underlying patent.

Recommended next steps

The primary recommended next step for any party facing an assertion related to "US patent 027852" would be to verify the existence and correct numbering of the patent in question. Based on the comprehensive analysis conducted across multiple sections of this report, U.S. Patent 027852 does not correspond to an issued U.S. patent. Without a valid patent, no infringement can occur, and thus, no PTAB proceeding can be initiated. If a demand letter or assertion references this number, it is highly likely that there is a typographical error or misunderstanding regarding the patent's identity.

It is crucial to re-confirm the correct patent number with the asserting party and then, if a valid patent number is provided, initiate a search for that correct number in the USPTO and PTAB databases. The absence of any PTAB activity for "US patent 027852" is a strong signal that the identifier itself is problematic. The USPTO's Open Data Portal provides comprehensive data on PTAB trials.

The previously generated sections consistently establish that U.S. Patent 027852 does not correspond to a known, issued U.S. utility or design patent in the records of the United States Patent and Trademark Office (USPTO). This fundamental absence of the patent itself means there are no claims, inventors, or an original assignee to analyze, and consequently, no assignment record to reconstruct.

Therefore, the directives to reconstruct the full assignment record, list inventors and their employers, describe the original assignee, and detail an assignment timeline are not feasible. The subsequent analysis of NPE/patent troll patterns, which relies on the existence and transfer history of the patent, is also precluded.

Inventors

No U.S. Patent with the number 027852 has been found in USPTO records. Therefore, no inventors can be identified or listed, as there is no patent document to reference.

Original assignee

As U.S. Patent 027852 does not exist, there is no original assignee to identify.

Assignment timeline

A search of the USPTO Patent Assignment Search database (assignmentcenter.uspto.gov) for U.S. Patent Number 027852 yields no records. The database contains recorded patent assignment information from August 1980 to the present. Since no patent with this number has been identified, it logically follows that there are no recorded assignments for it.

Timeline diagram

timeline
    title Ownership of US 027852
    No records : Patent not found in USPTO database

NPE / troll-pattern signals

Due to the absence of U.S. Patent 027852 in the USPTO database and, consequently, the lack of any assignment records, it is not possible to assess any of the NPE/troll-pattern signals. All signals are marked as "not present" because there is no data to support their presence or absence.

1. Shell-entity transfer — Not present.
2. Known asserter in the chain — Not present.
3. Repeat correspondent across the chain — Not present.
4. Cascading transfers — Not present.
5. Pre-litigation transfer — Not present.
6. Bankruptcy fire-sale — Not present.
7. Privateering — Not present.
8. Defensive aggregator (anti-NPE) — Not present.

Verdict

Insufficient data

The verdict is "Insufficient data" because U.S. Patent 027852 does not appear in USPTO records, as consistently established in the preceding sections of this analysis. Without an existing patent, there are no assignment records to analyze, thus preventing any determination of ownership patterns, including those related to NPEs or defensive aggregators.

For verification, please refer to the USPTO Patent Assignment Search at https://assignmentcenter.uspto.gov/.

Prior Art Analysis for US Patent 027852

As of April 29, 2026, a search of the United States Patent and Trademark Office (USPTO) database and other public patent repositories for U.S. Patent 027852 yields no results. This confirms the findings from the "Patent Summary" and "Litigation Summary" sections previously generated. The patent number 027852 does not correspond to a known, issued U.S. patent.

Prior art is defined as any information that has been made available to the public before a given date that might be relevant to a patent's claims of originality. Under U.S. law, prior art can include U.S. patents, published U.S. patent applications, foreign patents, and a variety of non-patent literature. This art is used by patent examiners and cited by applicants to determine the novelty and non-obviousness of a claimed invention.

A patent's "citations" or "references" section lists the prior art that was considered during its examination. This list includes references found by the USPTO examiner and those disclosed by the applicant in an Information Disclosure Statement (IDS).

Because U.S. Patent 027852 does not appear to exist, it follows that:

1. The patent has no claims.
2. The patent never underwent examination at the USPTO.
3. There is no official record of patent citations or prior art references associated with it.

Consequently, it is not possible to identify the most relevant prior art for US patent 027852 or to analyze which claims a given reference might anticipate under 35 U.S.C. § 102. The request cannot be completed as its subject matter is not found in public records.

Obviousness Analysis of US Patent 027852 under 35 U.S.C. § 103

As of April 29, 2026, an analysis of the obviousness of US patent 027852 under 35 U.S.C. § 103 cannot be performed. The legal standard for obviousness requires a factual inquiry into the scope and content of the prior art, the differences between the prior art and the claims at issue, and the level of ordinary skill in the pertinent art. The core of this analysis involves comparing one or more prior art references against the specific limitations of a patent's claims to determine if the claimed invention would have been obvious to a person of ordinary skill at the time the invention was made.

This analysis is precluded by the findings established in the previously generated sections of this patent report:

1. Absence of Patent Claims: The "Patent Summary" concludes that US patent 027852 does not correspond to a known, issued U.S. patent. Consequently, there are no claims to analyze. An obviousness assessment is fundamentally an evaluation of the patentability of the claimed subject matter; without claims, there is nothing to assess.

2. Absence of Prior Art: The "Prior Art" section states that because the patent does not appear to exist, "There is no official record of patent citations or prior art references associated with it." The process of identifying relevant prior art and a motivation to combine references is dependent on having a specific set of claims as a target for the invalidity argument.

In summary, because US patent 027852 cannot be located in public records and therefore has no identifiable claims or associated prior art, the foundational elements required for an obviousness analysis under 35 U.S.C. § 103 are missing. It is not possible to identify combinations of prior art references or explain a motivation to combine them in the absence of a claimed invention.

Prosecution and Term Analysis for US Patent 027852

As of April 29, 2026, a detailed analysis of the prosecution history and patent term for US patent 027852 cannot be provided. This is because, as established in the "Patent Summary," "Litigation Summary," "Prior Art," and "Obviousness" sections of this report, a U.S. patent with the number 027852 does not appear to exist in the records of the United States Patent and Trademark Office (USPTO).

The concepts of patent term, adjustments, extensions, and application lineage are all attributes of a validly filed and issued patent. Without a patent, these attributes have no basis.

• Patent Term Adjustments (PTA): PTA is a mechanism under 35 U.S.C. § 154(b) to compensate for delays caused by the USPTO during the examination of a patent application. Since no application leading to a patent numbered 027852 has been identified, there is no examination history and therefore no basis for calculating or awarding PTA.

• Patent Term Extensions (PTE): PTE is granted under 35 U.S.C. § 156 to restore patent term lost due to premarket regulatory review, typically by the Food and Drug Administration (FDA). This applies only to specific products and patents. As there is no patent 027852, no such extension could have been sought or granted.

• Continuation and Divisional Applications: These types of applications (continuations, continuations-in-part, and divisionals) create a family of related patents that share a common priority date and specification. A search for continuity data related to US patent 027852 is not possible because the patent itself cannot be located. The "Litigation Summary" did note other identifiers (e.g., application number US07/027,852) that are distinct from the requested patent number and lead to different patents.

• Patent Family Members: A patent family comprises all the patent documents filed in various countries to protect a single invention. Without a priority document or a known U.S. patent, a search for international counterparts to US patent 027852 cannot be performed.

• Projected Expiration Date: The expiration date of a U.S. utility patent filed after June 8, 1995, is generally 20 years from the earliest effective filing date, plus or minus any adjustments. Since US patent 027852 has no filing date, issue date, or any term adjustments, no expiration date can be projected.

In conclusion, all inquiries regarding the prosecution history, term, and application family of US patent 027852 are moot. The foundational subject of the query—a U.S. patent with the number 027852—is not found in public patent records.

Defensive Disclosure Analysis for US Patent 027852

To: Defensive Publishing Committee
From: Senior Patent Strategist and Research Engineer
Date: 2026-04-29
Subject: Infeasibility of Generating Defensive Disclosure for US Patent 027852

1.0 Executive Summary

This memorandum addresses the request to generate a comprehensive "Defensive Disclosure" document based on the claims of US patent 027852. The objective was to create prior art to preemptively render future incremental inventions by competitors obvious or non-novel. However, the foundational prerequisite for this task—the existence of an issued U.S. patent with the number 027852—cannot be satisfied. A diligent search, adhering to the strict instruction to interpret the patent number literally, confirms that no such patent exists in the records of the U.S. Patent and Trademark Office (USPTO). This finding is consistent with all previously generated sections of this patent analysis.

2.0 Verification of Patent Status

As of April 29, 2026, a search was conducted using the USPTO's public search tools (Patent Public Search) and other patent databases for the literal identifier "027852".

• The search confirms that no issued U.S. utility, design, or plant patent with the number 027852 exists.
• The number does not conform to standard USPTO numbering conventions for issued patents, which typically contain seven or eight digits for modern utility patents.
• Searches for similar numbers, such as U.S. Patent 7,220,852 B1 ("Coronavirus isolated from humans"), are explicitly outside the scope of this analysis per the operating rules.

This result corroborates the findings from the "Patent Summary," "Litigation Summary," "Prior Art," "Obviousness," and "Extensions" sections of this report, all of which concluded that the patent in question is not a valid, issued U.S. patent.

3.0 Impediment to Generating the Defensive Disclosure

The "Derivation Framework" for this task requires the analysis of each core claim in the patent to generate derivative variations. The framework specifies deriving variations along five axes: Material & Component Substitution, Operational Parameter Expansion, Cross-Domain Application, Integration with Emerging Tech, and Inverse/Failure Mode.

This process is fundamentally impossible for the following reason:

• Absence of Claims: Since US patent 027852 does not exist, it has no claims. Claims are the legally operative text that defines the scope of an invention. Without claims, there is no technical baseline from which to derive any variations.
• Lack of Technical Substrate: A defensive disclosure must be detailed enough to constitute enabling prior art. This requires a specific invention as a starting point. It is not possible to inventively substitute materials, expand operational parameters, or integrate emerging technologies into a non-existent mechanism.

4.0 Conclusion

The request to generate a defensive disclosure for US patent 027852 cannot be fulfilled. The task is predicated on the existence of the patent and its claims, which our research has consistently shown to be non-existent in public records. Any attempt to proceed would require fabricating a subject invention, which is contrary to the principles of defensive publishing and the rules of this analysis.

Therefore, no derivative works, enabling descriptions, Mermaid.js diagrams, or "Combination Prior Art" scenarios can be produced. The analysis is terminated due to the non-existence of the subject matter.