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C. Perfringens Alpha Toxoid Vaccine

US 9,662,380 Term ended
OverviewAssignmentsSources & methods

Term ended Oct 17, 2026 · High confidence

Filed Jan 29, 2015 as application 14/608,577 · Granted May 30, 2017
Base term plus 183 days of patent term adjustment (USPTO delay)
Today
20 years from filing
Term ended Oct 17, 2026
2006 2026
Clock starts
Apr 17, 2006
Term ended
Oct 17, 2026
Granted
May 30, 2017
base term patent term adjustment after the term ends fee events Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
183
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 8,980,283, to Oct 17, 2026. The term already ends on or before that date, so the cap shortened nothing.
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.

This patent's term runs 183 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. Confidence: High. from the record

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.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Apr 17, 2006, when application 11/405,198, the earliest non-provisional in its chain, was filed (this one was filed Jan 29, 2015)Apr 17, 2026High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+183 days, USPTO patent term adjustment recordOct 17, 2026High confidence
Terminal disclaimer capDisclaimer resolved from the filed document (refs US 8,980,283)resolves to Oct 17, 2026, no earlier than this term, so no changeHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events2 of 2 maintenance fees paidterm endedHigh confidence
Computed term endThe steps above, in orderOct 17, 2026High confidence

Assignments

Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
RecordedAssignorAssigneeConveyance
Sep 26, 2023
Reel 65028, frame 818
Intervet Inc.Intervet Inc.Change of Address

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.

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