Invalidity dossier
US 8908700
Systems and methods for bridging a WAN accelerator with a security gateway
Current assignee: Citrix Systems Inc
Added 9/23/2026, 8:57:31 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US8908700B2
Title: Systems and methods for bridging a WAN accelerator with a security gateway
Patent number: US8908700B2 | Application: US11/851,934 | Publication: US20090067440A1
Assignee/Applicant: Citrix Systems Inc (original and current assignee listed)
Key dates (as listed): Priority/filing 2007-09-07; granted/publication 2014-12-09; adjusted expiration 2031-04-03. Legal status "Active" (stated as an assumption, not a legal conclusion).
Inventors: Sanjay Chadda, Allen Samuels, Dan Decasper, Zubin Dittia, Shiva Ankam
Purpose (per source): The application "generally relates to data communication networks" and to "processing network packets between a network accelerator program and a security gateway program." The described problem: an intermediary device may host multiple packet-processing programs at different network-stack layers—e.g., a WAN acceleration device intercepting at Layer 2, versus a security gateway (such as Microsoft's ISA server) applying policies at Layer 3—and "the functionality of these devices operating at different layers of the network may not be interoperable," since a packet processed at Layer 2 may not traverse the stack up to the Layer 3 program.
Plain-language scope (per source): The solution "bridges the communications of a network packet between a first network processing program operating at a first level of a network stack... and a second network processing program operating at a second level." The first program modifies an incoming packet so it can traverse the stack to the upper-level second program, and so it reaches its intended destination while traversing the intermediary. The excerpt characterizes the first program as a WAN accelerator (transparent Layer 2 bridge) and the second as a Layer 3 edge security gateway (e.g., ISA server).
Excerpt limitations: No claims are reproduced here, so claim scope is not established. The excerpt truncates mid-sentence ("the techniques described"); specific embodiments, figures, and the full specification are omitted. No litigation, validity, or prior-art conclusions are drawn; transfer/reassignment entries are not analyzed here.
Source: https://patents.google.com/patent/[US8908700](/patent/US8908700)/en
Generated 10/1/2026, 9:41:03 PM
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Litigation summary
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Proceedings on file (0)
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PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
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Obviousness
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Extensions
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Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.