13 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.
The next term ends in Sep 2036. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Sep 2036
Next term end
13
Patent families
When these terms end
Held patents by the year their term ends
notable patents
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.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Dec 2036 · High confidence
Also notable
Ends Sep 2036 · High confidence
Also notable
Ends Dec 2039 · High confidence
Magnetic Levitation Reaction Sphere
US 10,532,832
The earliest of the three still in force, granted 2020 and renewed since. Its term ends first, in 2036.
Magnetic-Fluid Momentum Sphere
US 10,597,172
The earliest of the three still in force, granted 2020 and renewed since. Its term ends first, in 2036.
Five-Degree-Of-Freedom Heterodyne Grating Interferometry System
US 11,703,361
The newest of the three, granted 2023. It anchors the portfolio to 2039, later than anything else here.
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 Jan 18, 2027The maintenance fee for Five-Degree-Of-Freedom Heterodyne Grating Interferometry System (US 11,703,361) comes due Jan 18, 2027. Unpaid by Jul 19, 2027, it lapses early.
- 1 fee due Jul 14, 2027The maintenance fee for Magnetic Levitation Reaction Sphere (US 10,532,832) comes due Jul 14, 2027. Unpaid by Jan 14, 2028, it lapses early.
- 2 fees due Sep 24 to 26, 2027 · next Sep 24
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
The 5 largest of its 13 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 10,597,172 | Magnetic-Fluid Momentum Sphere In force · High confidence | In force | High confidence | |
| US 10,532,832 | Magnetic Levitation Reaction Sphere In force · High confidence | In force | High confidence | |
| US 11,307,018 | Two-Degree-Of-Freedom Heterodyne Grating Interferometry Measurement System In force · High confidence | In force | High confidence | |
| US 11,703,361 | Five-Degree-Of-Freedom Heterodyne Grating Interferometry System In force · High confidence | In force | High confidence | |
| US 12,038,690 | Laser Interference Photolithography System In force · High confidence | In force | High confidence | |
| US 12,189,300 | Scanning Interference Lithographic System In force · High confidence | In force | High confidence | |
| US 11,940,349 | Plane Grating Calibration System In force · High confidence | In force | High confidence | |
| US 12,332,053 | Heterodyne Grating Interferometry System Based on Secondary Diffraction In force · High confidence | In force | High confidence | |
| US 12,460,917 | Interferometer Displacement Measurement System and Method held by Beijing U-Precision Tech Co., Ltd. and Beijing United Victory Precision Technology Co., Ltd. In force · High confidence | In force | High confidence | |
| US 12,332,041 | Heterodyne Fiber Interferometer Displacement Measuring System and Method held by Beijing U-Precision Tech Co., Ltd. and Beijing United Victory Precision Technology Co., Ltd. In force · High confidence | In force | High confidence |
Also on record, not counted in the 13: 1 patent in force now held by others · 2 patents ended. 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.