Term ends Mar 15, 2037 · Medium confidence
20-year base term ends Mar 15, 2037
Why Medium: A parent in the chain could not be resolved.
Held by Ennostar Corporation
Filed Sep 19, 2022 as application 17/947,536 · Granted Oct 15, 2024
Base term, 20 years from filing
Today
2017
2037
Clock starts
Mar 15, 2017
Mar 15, 2017
Term ends
Mar 15, 2037
Mar 15, 2037
Granted
Oct 15, 2024
Oct 15, 2024
base term
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.
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.
5
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. 0 of 3 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 Mar 15, 2017, when application 15/459,310, the earliest non-provisional in its chain, was filed (this one was filed Sep 19, 2022); a parent in its chain could not be resolved (the next row) | Mar 15, 2037 | 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 | 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 | 0 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 15, 2037 | Medium confidence |
This family
| US 10,170,440 | In force Mar 2037 | Mar 2037 |
| US 10,622,325 | In force Mar 2037 | Mar 2037 |
| US 10,910,335 | In force Mar 2037 | Mar 2037 |
| US 11,450,639 | In force Mar 2037 | Mar 2037 |
| US 12,119,321 | this patent Mar 2037 | Mar 2037 |
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 |
|---|---|---|---|
| Sep 19, 2022 Reel 61139, frame 233 | Liao, Shih-an; Chen, Shau-yi; Hsu, Ming-chi; Liu, Chun-hung; Hsieh, Min-hsun | Epistar Corporation | Assignment of Assignor's Interest |
| Mar 20, 2026 Reel 75246, frame 564 | Epistar Corporation | Ennostar Corporation | Change of Name |
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.
What's changing
Mar 2037
Term ends Mar 15, 2037. Maintenance fees still fall due before then
Citations
0
later US patents cite 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.