193 patents currently held
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
15 more records may belong here and await a decision; they are not counted.
The next term ends in Dec 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
79
Ending by 2030
Dec 2026
Next term end
126
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 Aug 2028 · High confidence
Also notable
Ends Nov 2037 · High confidence
Also notable
Ends Jun 2033 · High confidence
Robotic Arm for Patient Positioning Assembly
US 8,160,205
Cited by 346 later US patents, top 1% of utility patents granted in 2012 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
Online Angle Selection in Rotational Imaging and Tracking Systems
US 10,342,996
Cited by 71 later US patents, top 5% of utility patents granted in 2019 in our data. Protection runs to 2037.
Image-Guided Radiation Treatment with Imaging Data Using Imaging Radiation at Different Energy Levels
US 10,485,989
Cited by 33 later US patents, top 10% of utility patents granted in 2019 in our data. 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.
- 5 fees due Dec 2 to 23, 2026 · next Dec 2
- 4 fees due Jan 2 to 11, 2027 · next Jan 2
- 4 fees due Feb 1 to 18, 2027 · next Feb 1
- 4 fees due Apr 10 to 29, 2027 · next Apr 10
- 1 fee due May 26, 2027The maintenance fee for Image-Guided Radiation Treatment with Imaging Data Using Imaging Radiation at Different Energy Levels (US 10,485,989) comes due May 26, 2027. Unpaid by Nov 26, 2027, it lapses early.
- 1 fee due Jun 10, 2027The maintenance fee for Gantry Image Guided Radiotherapy System and Related Treatment Delivery Methods (US 10,500,415) comes due Jun 10, 2027. Unpaid by Dec 10, 2027, it lapses early.
- 2 fees due Jul 14 to 23, 2027 · next Jul 14
- 4 fees due Aug 2 to 25, 2027 · next Aug 2
- 3 fees due Sep 5 to 30, 2027 · next Sep 5
- 2 fees due Oct 7 to 28, 2027 · next Oct 7
- 1 fee due Nov 3, 2027The maintenance fee for Gantry Image Guided Radiotherapy System and Related Treatment Delivery Methods (US 9,327,141) comes due Nov 3, 2027. Unpaid by May 3, 2028, it lapses early.
Recent changes
- 5 terms have ended since Aug 17, 2026
What they patent
The 5 largest of its 126 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Traveling Wave Linear Accelerator Based X-Ray Source Using Pulse Width to Modulate Pulse-To-Pulse Dosage | 9 in force | to Sep 2033 |
| Gantry Image Guided Radiotherapy System and Related Treatment Delivery Methods | 6 in force | to Apr 2033 |
| Online Angle Selection in Rotational Imaging and Tracking Systems | 5 in force | to Nov 2037 |
| Radiation Based Treatment Beam Position Calibration and Verification | 4 in force | to May 2037 |
| Systems and Methods for Real-Time Tumor Tracking During Radiation Treatment Using Ultrasound Imaging | 4 in force | to Aug 2034 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,643,661 | Method and System for Evaluating Delivered Dose In force · High confidence | In force | High confidence | |
| US 7,639,853 | Method of and System for Predicting Dose Delivery In force · High confidence | In force | High confidence | |
| US 8,767,917 | System and Method of Delivering Radiation Therapy to a Moving Region of Interest In force · High confidence | In force | High confidence | |
| US 7,693,257 | Treatment Delivery Optimization In force · High confidence | In force | High confidence | |
| US 8,402,581 | Method and Apparatus for Patient Loading and Unloading In force · High confidence | In force | High confidence | |
| US 7,552,490 | Method and Apparatus for Patient Loading and Unloading In force · High confidence | In force | High confidence | |
| US 7,639,854 | Method and System for Processing Data Relating to a Radiation Therapy Treatment Plan In force · High confidence | In force | High confidence | |
| US 7,831,073 | Precision Registration of X-Ray Images to Cone-Beam CT Scan for Image-Guided Radiation Treatment In force · High confidence | In force | High confidence | |
| US 7,505,559 | Determining a Target-To-Surface Distance and Using It for Real Time Absorbed Dose Calculation and Compensation In force · High confidence | In force | High confidence | |
| US 7,611,452 | Wizard and Template for Treatment Planning In force · High confidence | In force | High confidence |
Also on record, not counted in the 193: 1 patent in force now held by others · 50 patents ended · 7 applications pending · 22 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.