Term ends Mar 4, 2042 · High confidence
20-year base term ends Feb 9, 2042
Held by Ambilight Inc.
Filed May 19, 2022 as application 17/748,383 · Granted Jan 16, 2024
Base term plus 23 days of patent term adjustment (USPTO delay)
Today
2022
2042
Clock starts
Feb 9, 2022
Feb 9, 2022
Term ends
Mar 4, 2042
Mar 4, 2042
Granted
Jan 16, 2024
Jan 16, 2024
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
23
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 11,879,098, to Mar 4, 2042. The term already ends on or before that date, so the cap shortened nothing.
0 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.
22
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 23 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. 0 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 Feb 9, 2022, when application 17/668,300, the earliest non-provisional in its chain, was filed (this one was filed May 19, 2022) | Feb 9, 2042 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +23 days, USPTO patent term adjustment record | Mar 4, 2042 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 11,879,098) | resolves to Mar 4, 2042, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 4, 2042 | High confidence |
This family
| Application PCT/US2019/051112 | PCT application no patent term | no patent term |
| US 10,921,673 | In force Sep 2039 | Sep 2039 |
| US 12,061,403 | In force Apr 2042 | Apr 2042 |
| Application PCT/US2021/041863 | PCT application no patent term | no patent term |
| Application PCT/US2021/043458 | PCT application no patent term | no patent term |
| Application PCT/US2021/055015 | PCT application no patent term | no patent term |
| US 11,879,098 | In force Mar 2042 | Mar 2042 |
| US 11,874,578 | this patent Mar 2042 | Mar 2042 |
8 of 22 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 |
|---|---|---|---|
| Aug 30, 2022 Reel 60940, frame 168 | Mei, Jianguo; Pandit, Vaidehi; Wang, Zhiyang | Ambilight 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 2042
Term ends Mar 4, 2042. Maintenance fees still fall due before then
Note
The 23 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 11,879,098, ends no earlier than this term, so it caps nothing.
Citations
1
later US patent cites this one
Fewer than half of the utility patents granted in 2024 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.