Term ends Feb 6, 2036 · Medium confidence
20-year base term ends Apr 30, 2035
Why Medium: A parent in the chain could not be resolved.
Held by K&N Engineering, Inc.
Filed Jul 25, 2023 as application 18/226,167 · Granted Dec 23, 2025
Base term plus 282 days of patent term adjustment (USPTO delay)
Today
2015
2036
Clock starts
Apr 30, 2015
Apr 30, 2015
Term ends
Feb 6, 2036
Feb 6, 2036
Granted
Dec 23, 2025
Dec 23, 2025
base term
patent term adjustment
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
282
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
7
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 282 days past its 20-year base term on prosecution delay. 0 of 2 maintenance fees are paid so far. Confidence: Medium. 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 Apr 30, 2015, when application 14/701,163, the earliest non-provisional in its chain, was filed (this one was filed Jul 25, 2023); a parent in its chain could not be resolved (the next row) | Apr 30, 2035 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +282 days, USPTO patent term adjustment record | Feb 6, 2036 | 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 | 0 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 6, 2036 | Medium confidence |
This family
| Application PCT/US2015/028627 | PCT application no patent term | no patent term |
| US 10,294,897 | In force Sep 2036 | Sep 2036 |
| US 11,401,895 | In force Jan 2036 | Jan 2036 |
| Application 17/878,679 | Abandoned not computed | not computed |
| US 12,503,991 | this patent Feb 2036 | Feb 2036 |
| Application 18/424,611 | Pending not computed | not computed |
| Application 19/397,913 | Pending not computed | not computed |
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 24, 2024 Reel 71008, frame 165 | K & N Engineering, Inc. | Fifth Third Bank, National Association, as Agent | Security Interest |
| Oct 25, 2024 Reel 69268, frame 13 | K & N Engineering, Inc. | Ankura Trust Company, LLC | Patent Security Agreement – Supplement No. 1 |
| Nov 3, 2025 Reel 72767, frame 746 | Williams, Steve; Wall, Jere James | K&N Engineering, Inc. | Assignment of Assignor's Interest |
| May 8, 2026 Reel 75785, frame 57 | Ankura Trust Company, LLC | K & N Engineering, Inc. | Release of Security 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 2036
Term ends Feb 6, 2036. Maintenance fees still fall due before then
Note
The 282 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
0
later US patents cite this one
Fewer than half of the utility patents granted in 2025 in our data have been cited yet, so we show the count and do not rank on it.
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.