232 patents currently held
1,064 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
9 more records may belong here and await a decision; they are not counted.
The next term ends in Dec 2026. from the record
Of the 1,064 now held by other companies, 1,002 name Ennostar Corporation as their current owner, and 62 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
111
Ending by 2030
Dec 2026
Next term end
168
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
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
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends May 2032 · High confidence
Also notable
Ends Sep 2030 · High confidence
Also notable
Ends Mar 2037 · High confidence
Flat Panel Lighting Device and Driving Circuitry
US 10,364,974
Cited by 24 later US patents, top 10% of utility patents granted in 2019 in our data. Protection runs to 2032. A terminal disclaimer caps this term to an earlier patent's.
Light-Emitting Device
US 8,188,505
Cited by 35 later US patents, top 25% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2030.
Semiconductor Device and a Method of Manufacturing Thereof
US 10,170,440
Cited by 15 later US patents, top 25% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2037.
Formerly held, still cited
Notable
Ends Jan 2033 · High confidence
Cited by 81 later US patents, top 10% of utility patents granted in 2014 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2033.
now held by Ennostar Corporation
Also notable
Ends no later than Jan 2035 · Medium confidence
Cited by 49 later US patents, top 10% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2035. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.
now held by Ennostar Corporation
Also notable
Ends Aug 2034 · High confidence
Cited by 27 later US patents, top 25% of utility patents granted in 2017 in our data, and renewed at every maintenance window due so far. Protection runs to 2034.
now held by Ennostar Corporation
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 4 fees due Dec 4 to 30, 2026 · next Dec 4
- 4 fees due Jan 7 to 30, 2027 · next Jan 7
- 7 fees due Feb 4 to 25, 2027 · next Feb 4
- 4 fees due Mar 8 to 24, 2027 · next Mar 8
- 3 fees due Apr 6 to 20, 2027 · next Apr 6
- 1 fee due May 24, 2027The maintenance fee for LED Driver Circuit for Supplying Triac Holding Current by Using Controllable Current Source (US 9,198,243) comes due May 24, 2027. Unpaid by Nov 24, 2027, it lapses early.
- 3 fees due Jun 3 to 22, 2027 · next Jun 3
- 1 fee due Jul 7, 2027The maintenance fee for Optoelectronic Device and Method for Manufacturing the Same (US 10,529,893) comes due Jul 7, 2027. Unpaid by Jan 7, 2028, it lapses early.
- 1 fee due Aug 4, 2027The maintenance fee for Electronic Device (US 10,553,563) comes due Aug 4, 2027. Unpaid by Feb 4, 2028, it lapses early.
- 3 fees due Sep 1 to 29, 2027 · next Sep 1
- 1 fee due Oct 14, 2027The maintenance fee for Semiconductor Device and a Method of Manufacturing Thereof (US 10,622,325) comes due Oct 14, 2027. Unpaid by Apr 14, 2028, it lapses early.
- 2 fees due Nov 10 to 12, 2027 · next Nov 10
Recent changes
- Sep 23Assignment recorded on 1 record: Epistar Corporation to Ennostar Corporation Recorded Sep 23, 2026, executed Dec 11, 2025. Conveyance as recorded: Change of Name. A recorded assignment is a filed document, not a statement of current ownership. Reel 76560, frame 1.
- 8 of the patents on this record were granted since Aug 17, 2026
- 30 terms have ended since Aug 17, 2026
What they patent
The 5 largest of its 168 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Uniform Light Emitting Lamp Structure | 24 in force | to Mar 2038 |
| Light-Emitting Diode Structure with Transparent Window Covering Layer of Multiple Films | 9 in force | to Aug 2033 |
| Semiconductor Device and a Method of Manufacturing Thereof | 5 in force | to Mar 2037 |
| Method and Structure for Die Bonding Using Energy Beam | 4 in force | to Feb 2041 |
| Light Emitting Diode | 4 in force | to Aug 2029 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,473,939 | Light-Emitting Diode Structure with Transparent Window Covering Layer of Multiple Films held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US D674,759 | Wafer Carrier held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US D676,001 | Light Emitting Diode held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US 7,615,773 | Semiconductor Light-Emitting Device and Manufacturing Method Thereof held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US D680,085 | Light-Emitting Diode Array held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US D680,977 | Light Emitting Diode held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US D681,566 | Light-Emitting Diode Array held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US 7,934,855 | Flat Light-Emitting Apparatus held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US D684,550 | Light-Emitting Diode Array held by Ennostar Corporation In force · High confidence | In force | High confidence | |
| US 8,043,878 | Method for Manufacturing High Efficiency Light-Emitting Diodes held by Ennostar Corporation In force · High confidence | In force | High confidence |
Also on record, not counted in the 232: 1,064 patents in force now held by others · 468 patents ended · 105 applications pending · 285 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.