34 patents currently held
2 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.
5 more records may belong here and await a decision; they are not counted.
The next term ends in Apr 2029. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
7
Ending by 2030
Apr 2029
Next term end
18
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 May 2033 · High confidence
Also notable
Ends Apr 2029 · High confidence
Also notable
Ends no later than Apr 2030 · Medium confidence
Wireless, Motion and Position-Sensing, Integrating Radiation Sensor for Occupational and Environmental Dosimetry
US 8,822,924
The most cited patent in this portfolio, cited by 112 later US patents, top 5% of utility patents granted in 2014 in our data. Protection runs to 2033.
Method of Luminescent Solid State Dosimetry of Mixed Radiations
US 7,902,525
Cited by 29 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 2029.
Dosimeter with RFID Tag
US 8,148,701
Cited by 44 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. 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.
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.
- 3 fees due Dec 16 to 23, 2026 · next Dec 16
- 1 fee due Jan 7, 2027The maintenance fee for Wireless, Motion and Position-Sensing, Integrating Radiation Sensor for Occupational and Environmental Dosimetry (US 9,075,146) comes due Jan 7, 2027. Unpaid by Jul 7, 2027, it lapses early.
- 2 fees due Feb 11 to 25, 2027 · next Feb 11
- 3 fees due Nov 3, 2027
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 5 largest of its 18 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Wireless, Motion and Position-Sensing, Integrating Radiation Sensor for Occupational and Environmental Dosimetry | 10 in force | to May 2033 |
| Power System for Dosimeter Reader | 3 in force | to Sep 2031 |
| Novel Filters for Use in Dosimetry | 3 in force | to Oct 2030 |
| Optical System for Portable Osl Reader | 2 in force | to Aug 2033 |
| Method and Apparatus for Fast Determination of Unknown Radiation Dose | 2 in force | to Jul 2033 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,902,525 | Method of Luminescent Solid State Dosimetry of Mixed Radiations In force · High confidence | In force | High confidence | |
| US 8,148,701 | Dosimeter with RFID Tag In force · Medium confidence | In force | Medium confidence | |
| US 8,235,301 | Novel RFID Tag for Use in Dosimetry In force · Medium confidence | In force | Medium confidence | |
| US 8,476,604 | Novel Filters for Use in Dosimetry In force · High confidence | In force | High confidence | |
| US 8,530,862 | Novel Filters for Use in Dosimetry In force · High confidence | In force | High confidence | |
| US 9,329,278 | Dosimeter with RFID Tag In force · Medium confidence | In force | Medium confidence | |
| US 8,178,853 | Novel Filters for Use in Dosimetry In force · High confidence | In force | High confidence | |
| US 8,541,761 | Portable Dosimeter In force · Medium confidence | In force | Medium confidence | |
| US 8,785,887 | Power System for Dosimeter Reader In force · High confidence | In force | High confidence | |
| US 8,921,810 | Power System for Dosimeter Reader In force · High confidence | In force | High confidence |
Also on record, not counted in the 34: 2 patents in force now held by others · 9 patents ended · 1 application pending · 9 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.