13 patents currently held
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Nov 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
1
Ending by 2030
Nov 2027
Next term end
11
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 Nov 2027 · High confidence
Also notable
Ends Oct 2039 · High confidence
Also notable
Ends Jul 2033 · Medium confidence
Unipolar Semiconductor Photodetector with Suppressed Dark Current and Method for Producing the Same
US 8,004,012
Cited by 46 later US patents, top 25% of utility patents granted in 2011 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2027.
A Pixel Readout Circuit and a Method for Imaging
US 11,533,448
Cited by 5 later US patents, top 25% of utility patents granted in 2022 in our data. Protection runs to 2039.
Infra-Red Imager
US 9,194,750
Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2033.
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.
- 1 fee due May 24, 2027The maintenance fee for Infra-Red Imager (US 9,194,750) comes due May 24, 2027. Unpaid by Nov 24, 2027, it lapses early.
- 1 fee due Jun 15, 2027The maintenance fee for Detector Pixel Signal Readout Circuit Using an Ac Signal Component in Implementing an Event Detection Mode per Pixel (US 9,215,386) comes due Jun 15, 2027. Unpaid by Dec 15, 2027, it lapses early.
- 1 fee due Aug 25, 2027The maintenance fee for Dual Band Photodetector and a Method Thereof (US 10,573,675) comes due Aug 25, 2027. Unpaid by Feb 25, 2028, it lapses early.
- 1 fee due Nov 5, 2027The maintenance fee for Photodetector-Arrays and Methods of Fabrication Thereof (US 10,644,061) comes due Nov 5, 2027. Unpaid by May 5, 2028, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 5 largest of its 11 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Semiconductor Device | 2 in force | to Apr 2036 |
| Semiconductor Barrier Photo-Detector | 2 in force | to Sep 2034 |
| A Pixel Readout Circuit and a Method for Imaging | 1 in force | to Oct 2039 |
| Infra-Red Imager | 1 in force | to Jul 2033 |
| Unipolar Semiconductor Photodetector with Suppressed Dark Current and Method for Producing the Same | 1 in force | to Nov 2027 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,004,012 | Unipolar Semiconductor Photodetector with Suppressed Dark Current and Method for Producing the Same In force · High confidence | In force | High confidence | |
| US 9,215,386 | Detector Pixel Signal Readout Circuit Using an Ac Signal Component in Implementing an Event Detection Mode per Pixel In force · High confidence | In force | High confidence | |
| US 9,194,750 | Infra-Red Imager In force · Medium confidence | In force | Medium confidence | |
| US 9,761,751 | Semiconductor Barrier Photo-Detector In force · High confidence | In force | High confidence | |
| US 9,627,563 | Semiconductor Barrier Photo-Detector In force · High confidence | In force | High confidence | |
| US 9,613,999 | Semiconductor Device In force · High confidence | In force | High confidence | |
| US 10,079,262 | Semiconductor Photo-Detector In force · High confidence | In force | High confidence | |
| US 10,222,266 | Ruggedized Dewar Unit for Integrated Dewar Detector Assembly In force · High confidence | In force | High confidence | |
| US 10,644,061 | Photodetector-Arrays and Methods of Fabrication Thereof In force · High confidence | In force | High confidence | |
| US 10,573,675 | Dual Band Photodetector and a Method Thereof In force · High confidence | In force | High confidence |
Also on record, not counted in the 13: 5 patents ended · 3 applications pending. 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.