Term ends Mar 26, 2028 · High confidence
20-year base term ends Dec 21, 2036
Held by Littelfuse, Inc.
Filed Feb 26, 2019 as application 16/285,878 · Granted Sep 15, 2020
Base term plus 33 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2016
2036
Clock starts
Dec 21, 2016
Dec 21, 2016
Term ends
Mar 26, 2028
Mar 26, 2028
Granted
Sep 15, 2020
Sep 15, 2020
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
33
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 10,476,134, US 9,960,545.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
6
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 33 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 1 of 1 maintenance fees is 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 Dec 21, 2016, when application 15/386,144, the earliest non-provisional in its chain, was filed (this one was filed Feb 26, 2019) | Dec 21, 2036 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +33 days, USPTO patent term adjustment record | Jan 23, 2037 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,476,134, US 9,960,545) | capped to Mar 26, 2028 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 1 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 26, 2028 | High confidence |
This family
| US 9,960,545 | In force Dec 2036 | Dec 2036 |
| Application PCT/US2017/041917 | PCT application no patent term | no patent term |
| US 10,476,215 | In force Dec 2036 | Dec 2036 |
| US 10,389,106 | In force Dec 2036 | Dec 2036 |
| US 10,333,294 | In force Dec 2036 | Dec 2036 |
| US 10,777,947 | this patent Mar 2028 | Mar 2028 |
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 |
|---|---|---|---|
| Feb 26, 2019 Reel 48443, frame 102 | Gulubovic, Boris; Yu, Kunghao | Littelfuse, Inc. | 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
Mar 2028
Term ends Mar 26, 2028. No further fees fall due before then
Note
The 33 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 10,476,134, US 9,960,545.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2020 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.