Term ends Jan 24, 2033 · High confidence
20-year base term ends Jan 24, 2033
Held by Ennostar Corporation
Filed Sep 30, 2013 as application 14/041,193 · Granted Mar 25, 2014
Base term, 20 years from filing
Today
2013
2033
Clock starts
Jan 24, 2013
Jan 24, 2013
Term ends
Jan 24, 2033
Jan 24, 2033
Granted
Mar 25, 2014
Mar 25, 2014
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.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
15
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. All three maintenance fees are recorded paid; no more fees are due. 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 Jan 24, 2013, when application 13/748,864, the earliest non-provisional in its chain, was filed (this one was filed Sep 30, 2013) | Jan 24, 2033 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jan 24, 2033 | High confidence |
This family
| US 8,759,125 | In force Feb 2033 | Feb 2033 |
| US 8,629,475 | In force Jan 2033 | Jan 2033 |
| US 8,907,362 | In force Jan 2033 | Jan 2033 |
| US 8,896,010 | Lapsed on the fee record Nov 2022 | Nov 2022 |
| US 8,680,558 | this patent Jan 2033 | Jan 2033 |
| US 8,748,929 | In force Jan 2033 | Jan 2033 |
| US 8,785,960 | In force Jan 2033 | Jan 2033 |
| US 8,884,326 | In force Jan 2033 | Jan 2033 |
8 of 15 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 |
|---|---|---|---|
| Sep 30, 2013 Reel 31309, frame 146 | Tischler, Michael A. | Cooledge Lighting Inc. | Assignment of Assignor's Interest |
| Nov 30, 2015 Reel 37171, frame 512 | Cooledge Lighting Inc. | Comerica Bank | Security Interest |
| Jun 21, 2018 Reel 46169, frame 167 | Cooledge Lighting Inc. | Epistar Corporation | Assignment of Assignor's Interest |
| Jul 11, 2018 Reel 46325, frame 104 | Comerica Bank | Cooledge Lighting Inc. | Release of Security Interest |
| Feb 18, 2026 Reel 75171, frame 402 | 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
Jan 2033
Term ends Jan 24, 2033. No further fees fall due before then
Citations
21
later US patents cite this one
That is top 25% of utility patents granted in 2014 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.