System and Method for Integrated Header, State, Rate and Content Anomaly Prevention for Session Initiation Protocol

US 9,729,509 In force

Term ends Jul 12, 2027 · Medium confidence

Computed 20-year base term

Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 7,626,940), so the cap could be lower.

Held by Athena Security, LLP

Filed Mar 23, 2013 as application 13/849,485 · Granted Aug 8, 2017

Base term plus 598 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer

Today

20 years from filing

Term ends Jul 12, 2027

2013 2033

Clock starts
Mar 23, 2013

Term ends
Jul 12, 2027

Granted
Aug 8, 2017

base term after the term ends fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know

598

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

Capped

Terminal disclaimer

Resolved from the filed document, referencing US 7,626,940.

2 of 2

Maintenance fees paid

Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts Mar 23, 2013, when this application, 13/849,485, was filed	Mar 23, 2033	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+598 days, USPTO patent term adjustment record	Nov 11, 2034	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 7,626,940)	capped to Jul 12, 2027	Medium confidence
Patent term extension	None on file	no change	High confidence
Fee events	2 of 2 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Jul 12, 2027	Medium confidence

Sources

Google Patents · The patent document at USPTO · Assignment records at USPTO

USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup

Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.

Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.

Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built

Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.

System and Method for Integrated Header, State, Rate and Content Anomaly Prevention for Session Initiation Protocol

Term ends Jul 12, 2027 · Medium confidence

20-year base term ends Mar 23, 2033

How we calculated this date

Sources