Prior art

Based on the provided authoritative text for US11143120, there is no explicit "References Cited" section listing external prior art documents (e.g., patents or publications cited by the examiner during prosecution) in the typical format.

However, the patent includes a "CROSS-REFERENCE TO RELATED APPLICATIONS" section, which lists several parent applications from which US11143120 claims priority. While these are not typically considered anticipatory prior art under 35 U.S.C. § 102 for claims fully supported by the earliest common priority date, they are highly relevant to understanding the invention's evolution and scope within its patent family.

The earliest priority date for US11143120 is June 12, 2015.

The patents identified in the "CROSS-REFERENCE TO RELATED APPLICATIONS" section are:

1. US 10,221,780 B2

   • Full Citation: U.S. Pat. No. 10,221,780 B2, titled "Dual fuel lockout switch for generator engine".
   • Publication/Filing Date: Filed on June 12, 2015 (as U.S. patent application Ser. No. 14/738,060), and issued on March 5, 2019.
   • Brief Description: This patent describes a dual-fuel engine system, particularly focusing on a lockout switch that prevents simultaneous delivery of liquid and gaseous fuels to an engine. It also details a carburetor cutoff solenoid to manage liquid fuel in the float bowl during fuel changeover to prevent over-rich conditions.
   • Potential Anticipation under 35 U.S.C. § 102: As US11143120 is a continuation-in-part or continuation of the application that led to US102217780B2, and shares the same earliest priority date (June 12, 2015), this patent would generally not anticipate claims in US11143120 that are fully supported by this common priority date. It lays the groundwork for the core dual-fuel concepts.

2. US 10,697,398 B2

   • Full Citation: U.S. Pat. No. 10,697,398 B2, titled "Batteryless dual fuel engine with liquid fuel cut-off".
   • Publication/Filing Date: Filed on October 28, 2015 (as U.S. patent application Ser. No. 14/925,441), claiming priority to the June 12, 2015 application, and issued on July 7, 2020.
   • Brief Description: This patent refines the dual-fuel engine concept, likely focusing on batteryless operation and improved liquid fuel cut-off mechanisms within the fuel system.
   • Potential Anticipation under 35 U.S.C. § 102: Similar to US102217780B2, this is a family member of US11143120. It generally would not anticipate claims in US11143120 that are entitled to the common priority date of June 12, 2015.

3. US 10,393,034 B2

   • Full Citation: U.S. Pat. No. 10,393,034 B2, titled "Fuel system for a multi-fuel internal combustion engine".
   • Publication/Filing Date: Filed on October 4, 2016 (as U.S. patent application Ser. No. 15/285,215), claiming priority to the earlier applications, and issued on August 27, 2019.
   • Brief Description: This patent describes a fuel system for a multi-fuel internal combustion engine, expanding to potentially cover multiple gaseous fuels in addition to liquid fuel. It further details the control of fuel flow for these various fuel types.
   • Potential Anticipation under 35 U.S.C. § 102: As a parent application in the priority chain of US11143120, this patent would generally not anticipate claims in US11143120 that are fully supported by the common priority date of June 12, 2015.

4. US 10,697,379 B2

   • Full Citation: U.S. Pat. No. 10,697,379 B2, titled "Tri fuel gen".
   • Publication/Filing Date: Filed on March 20, 2019 (as U.S. patent application Ser. No. 16/358,822), claiming priority to the earlier applications, and issued on July 7, 2020.
   • Brief Description: This patent likely details a tri-fuel generator system, extending the multi-fuel capabilities to three distinct fuel sources and their associated fuel delivery and control mechanisms.
   • Potential Anticipation under 35 U.S.C. § 102: US11143120 is a continuation of this application. Therefore, for claims in US11143120 that are entitled to the common priority date of June 12, 2015, this patent would generally not serve as anticipatory prior art under 35 U.S.C. § 102.

It is important to note that a definitive assessment of anticipation under 35 U.S.C. § 102 would require a detailed claim-by-claim comparison and a thorough review of the prosecution history to determine if any claims in US11143120 contain new subject matter not entitled to the earliest priority date. In such a scenario, these parent applications could potentially act as prior art against those specific claims based on their respective filing or publication dates.