Term ends Feb 3, 2034 · High confidence
20-year base term ends Nov 3, 2031
Held by Briggs & Stratton, LLC
Filed Nov 3, 2011 as application 13/288,027 · Granted Sep 6, 2016
Base term plus 823 days of patent term adjustment (USPTO delay)
Today
2011
2034
Clock starts
Nov 3, 2011
Nov 3, 2011
Term ends
Feb 3, 2034
Feb 3, 2034
Granted
Sep 6, 2016
Sep 6, 2016
base term
patent term adjustment
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
823
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
13
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 runs 823 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. 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 Nov 3, 2011, when this application, 13/288,027, was filed | Nov 3, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +823 days, USPTO patent term adjustment record | Feb 3, 2034 | 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 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 3, 2034 | High confidence |
This family
| US 8,403,102 | In force Jan 2032 | Jan 2032 |
| US 8,240,639 | In force Aug 2030 | Aug 2030 |
| US 8,517,146 | In force Jul 2031 | Jul 2031 |
| US 7,914,609 | In force Jul 2029 | Jul 2029 |
| US 8,065,823 | Lapsed on the fee record Nov 2019 | Nov 2019 |
| US 8,402,680 | Lapsed on the fee record Mar 2025 | Mar 2025 |
| US 8,241,378 | In force no later than Oct 2028 | no later than Oct 2028 |
| US 9,433,147 | this patent Feb 2034 | Feb 2034 |
8 of 13 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 |
|---|---|---|---|
| Nov 3, 2011 Reel 27165, frame 716 | Schmalz, Jacob J. | Briggs & Stratton Corporation | Assignment of Assignor's Interest |
| Sep 27, 2019 Reel 50564, frame 916 | Briggs & Stratton Corporation | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Interest |
| Jul 22, 2020 Reel 53287, frame 487 | Briggs & Stratton Corporation | JPMorgan Chase Bank, N.A., as Collateral Agent | Security Interest |
| Aug 21, 2020 Reel 54617, frame 331 | JPMorgan Chase Bank, N.A., as Collateral Agent | Briggs & Stratton Corporation | Release of Security Interest |
| Sep 21, 2020 Reel 53838, frame 46 | Briggs & Stratton, LLC | Wells Fargo Bank, National Association, as Collateral Agent | Security Interest |
| Sep 22, 2020 Reel 53850, frame 192 | Briggs & Stratton, LLC | KPS Capital Finance Management, LLC | Security Interest |
| Sep 22, 2020 Reel 53885, frame 211 | JPMorgan Chase Bank, N.A., as Collateral Agent | Briggs & Stratton Corporation | Release of Security Interest |
| Jul 30, 2021 Reel 57042, frame 247 | Briggs & Stratton Corporation | Briggs & Stratton, LLC | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Feb 2034
Term ends Feb 3, 2034. Maintenance fees still fall due before then
Note
The 823 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
14
later US patents cite this one
That is top 25% of utility patents granted in 2016 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.