Also listed on Interlight Optotech Corporation, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Sep 23, 2034 · High confidence
20-year base term ends Sep 23, 2034
Held by Ennostar Corporation
Filed Oct 19, 2016 as application 15/297,554 · Granted Apr 17, 2018
Base term, 20 years from filing
Today
2014
2034
Clock starts
Sep 23, 2014
Sep 23, 2014
Term ends
Sep 23, 2034
Sep 23, 2034
Granted
Apr 17, 2018
Apr 17, 2018
base term
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
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 9,502,622, to Sep 23, 2034. The term already ends on or before that date, so the cap shortened nothing.
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.
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Sep 23, 2014, when application 14/493,940, the earliest non-provisional in its chain, was filed (this one was filed Oct 19, 2016) | Sep 23, 2034 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,502,622) | resolves to Sep 23, 2034, no earlier than this term, so no change | 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 | Sep 23, 2034 | High confidence |
This family
| US 9,502,622 | In force Sep 2034 | Sep 2034 |
| US 9,947,839 | this patent Sep 2034 | Sep 2034 |
| US 10,319,886 | In force Sep 2034 | Sep 2034 |
| US 10,910,528 | In force Sep 2034 | Sep 2034 |
| US 11,450,791 | In force Sep 2034 | Sep 2034 |
| US 11,949,050 | In force Sep 2034 | Sep 2034 |
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 8, 2018 Reel 46577, frame 652 | Epistar Corporation; Huga Optotech Inc.; Formosa Epitaxy Inc. | Epistar Corporation | Merger |
| Aug 8, 2018 Reel 46577, frame 672 | Interlight Optotech Corporation | Epistar Corporation; Kaistar Lighting (Xiamen) Co., Ltd. | Assignment of Assignor's Interest |
| Aug 8, 2018 reel/frame not recorded | Interlight Optotech Corporation | Epistar Corporation | Assignment of Assignor's Interest |
| Aug 8, 2018 reel/frame not recorded | Interlight Optotech Corporation | Kaistar Lighting (Xiamen) Co., Ltd. | Assignment of Assignor's Interest |
| Jun 24, 2024 Reel 67822, frame 875 | Kaistar Lighting(Xiamen) Co., Ltd. | Bridgelux Optoelectronics (Xiamen) Co., Ltd. | Change of Name |
| Apr 22, 2026 Reel 75513, frame 783 | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Sep 2034
Term ends Sep 23, 2034. Maintenance fees still fall due before then
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 9,502,622, ends no earlier than this term, so it caps nothing.
Citations
14
later US patents cite this one
That is top 25% of utility patents granted in 2018 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.