Invalidity dossier
US 9826033
Load balancer bypass
Current assignee: Microsoft Technology Licensing LLC
Added 9/23/2026, 9:38:17 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview: US9826033B2 — "Load balancer bypass"
Source: https://patents.google.com/patent/[US9826033](/patent/US9826033)/en
Bibliographic data (as listed): US Patent 9826033 B2; application US14/972,951; filed 2015-12-17; published 2016-04-14 as US20160105499A1; granted 2017-11-21. Priority date listed as 2012-10-16, with anticipated expiration 2032-10-16. Inventors: Hemant Kumar, Parveen Kumar Patel, Deepak Bansal. Current assignee: Microsoft Technology Licensing LLC; original assignee same. Legal status listed as "Expired - Fee Related" (an assumption, not a legal conclusion).
Purpose: A load balancer lets multiple machines share one virtual network address, receiving messages addressed to that address, choosing a machine to handle them, and forwarding toward a destination intermediary. This patent addresses "bypassing a load balancer that initially appeared in a multi-message flow from a source machine served by a source intermediary and a destination machine served by a destination intermediary."
Plain-language scope (from the supplied definitions): In one aspect, a destination intermediary receives a source-side message whose destination is the load balancer's virtual network address, augmented by the load balancer to include the destination machine's network address. The destination intermediary determines that the source intermediary should address subsequent messages of the same flow to bypass the load balancer, modifies the message to address the destination machine, and forwards it. It then receives the destination machine's response, modifies the response so its source address is the load balancer's virtual network address, and dispatches it to the source machine. In a complementary aspect, a source intermediary sends messages to the load balancer, receives an augmented response, extracts the destination machine's routable device identifier, modifies the response's source address to the load balancer's virtual network address, dispatches it to the source machine, and redirects subsequent flow messages directly to the destination machine, bypassing the load balancer. Messages may be IP-layer messages; source/destination may be virtual or physical machines in any permutation.
Not established by this excerpt: the full text of the claims, the complete written description and figures (only an excerpt was supplied), prosecution history, and any prior-art analysis.
Generated 10/1/2026, 9:34:07 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
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Prior art
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Obviousness
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Extensions
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Derivative works
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