Term ended Aug 4, 2025 · High confidence
20-year base term ended Aug 4, 2025
USPTO later recorded it as expired for non-payment on May 11, 2026.
Held by Tyco Fire Products LP
Filed Aug 2, 2012 as application 13/507,846 · Granted Apr 8, 2014
Base term, 20 years from filing
Today
Term ended Aug 4, 2025
2005
2026
Clock starts
Aug 4, 2005
Aug 4, 2005
Term ended
Aug 4, 2025
Aug 4, 2025
Granted
Apr 8, 2014
Apr 8, 2014
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
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.
4
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term is its 20-year base term, with no adjustment for prosecution delay. 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.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Aug 4, 2005, when application 11/196,882, the earliest non-provisional in its chain, was filed (this one was filed Aug 2, 2012) | Aug 4, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on May 11, 2026, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Aug 4, 2025 | High confidence |
This family
| US 8,424,612 | Lapsed on the fee record Apr 2025 | Apr 2025 |
| US 8,881,839 | Grace period ended no later than Aug 2028 | no later than Aug 2028 |
| US 8,689,896 | this patent Aug 2025 | Aug 2025 |
3 of 4 applications in this family shown, earliest filings first. The applications whose file history this site holds. The family may have others.
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.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Oct 15, 2013 Reel 31407, frame 579 | Willfire HC, LLC | Tyco Fire & Security GmbH | Assignment of Assignor's Interest |
| Sep 27, 2018 Reel 47158, frame 767 | Tyco Fire & Security GmbH | Tyco Fire Products LP | Assignment of Assignor's Interest |
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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Alerts on its grants, lapses and transfers.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2014 in our data, the only group it is compared against.
How we rank
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.