351 patents currently held
5 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.
The next term ends in Apr 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
31
Ending by 2030
Apr 2027
Next term end
169
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 14, 2026 · includes USPTO assignment & status data published Nov 14, 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 Aug 2033 · Low confidence
Also notable
Ends Dec 2033 · High confidence
Also notable
Ends Oct 2035 · High confidence
Storage Device Including Ultraviolet Illumination
US 9,919,068
Cited by 91 later US patents, top 5% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2033. A terminal disclaimer caps this term to an earlier patent's.
Electronic Gadget Disinfection
US 9,138,499
Cited by 126 later US patents, top 5% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.
Ultraviolet-Based Detection and Sterilization
US 9,572,903
Cited by 107 later US patents, top 5% of utility patents granted in 2017 in our data, and renewed at every maintenance window due so far. Protection runs to 2035.
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.
- 5 fees due Nov 14 to 28, 2026 · next Nov 14
- 6 fees due Dec 2 to 30, 2026 · next Dec 2
- 5 fees due Jan 2 to 30, 2027 · next Jan 2
- 4 fees due Feb 6 to 25, 2027 · next Feb 6
- 4 fees due Mar 5 to 22, 2027 · next Mar 5
- 16 fees due Apr 1 to 29, 2027 · next Apr 1
- 10 fees due May 3 to 28, 2027 · next May 3
- 6 fees due Jun 3 to 30, 2027 · next Jun 3
- 4 fees due Jul 7 to 28, 2027 · next Jul 7
- 7 fees due Aug 4 to 23, 2027 · next Aug 4
- 13 fees due Sep 3 to 24, 2027 · next Sep 3
- 9 fees due Oct 2 to 26, 2027 · next Oct 2
- 4 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
- 2 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 169 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Optoelectronic Device with Modulation Doping | 9 in force | to Mar 2035 |
| Patterned Substrate Design for Layer Growth | 9 in force | to May 2034 |
| Semiconductor Material Doping Based on Target Valence Band Discontinuity | 6 in force | to Jun 2034 |
| Storage Device Including Ultraviolet Illumination | 6 in force | to May 2034 |
| Semiconductor Device with Low-Conducting Buried And/Or Surface Layers | 6 in force | to Jan 2033 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,030,575 | Mounting Structure Providing Electrical Surge Protection In force · High confidence | In force | High confidence | |
| US 7,553,456 | Organism Growth Suppression Using Ultraviolet Radiation In force · High confidence | In force | High confidence | |
| US 7,560,985 | Two-Stage Amplification Using Intermediate Non-Linear Square Wave In force · High confidence | In force | High confidence | |
| US 7,634,996 | Ultraviolet Radiation Sterilization In force · High confidence | In force | High confidence | |
| US 7,619,238 | Heterostructure Including Light Generating Structure Contained in Potential Well In force · High confidence | In force | High confidence | |
| US 7,655,962 | Enhancement Mode Insulated Gate Heterostructure Field-Effect Transistor with Electrically Isolated RF-Enhanced Source Contact In force · High confidence | In force | High confidence | |
| US 7,674,666 | Fabrication of Semiconductor Device Having Composite Contact In force · High confidence | In force | High confidence | |
| US 8,461,631 | Composite Contact for Semiconductor Device In force · High confidence | In force | High confidence | |
| US 7,848,379 | LED-Based Optical Pumping for Laser Light Generation In force · High confidence | In force | High confidence | |
| US 9,064,845 | Methods of Fabricating a Chromium/Titanium/Aluminum-Based Semiconductor Device Contact In force · High confidence | In force | High confidence |
Also on record, not counted in the 351: 5 patents in force now held by others · 17 patents ended · 16 applications pending · 23 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.