Five patents currently held, every record listed here
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Sep 2032. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Sep 2032
Next term end
5
Patent families
When these terms end
Each bar runs from grant to computed term end. 2015 to 2040.
US 10,385,442
Method for Preparing Rare-Earth Permanent Magnetic Material with Grain Boundary Diffusion Using Composite Target by Vapor Deposition
Dec 26, 2035
20202025203020352040
3 pending applications: term is not computable until grant.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 patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jul 2036 · High confidence
Also notable
Ends Sep 2032 · High confidence
Also notable
Ends Dec 2035 · High confidence
Powder metallurgy wear-resistant tool steel
US 10,385,428
The newest of the three, granted 2019. It anchors the portfolio to 2036, later than anything else here.
Iron-Based Amorphous Alloy Broad Ribbon and Its Manufacturing Method
US 9,053,847
Granted 2015 and renewed at every maintenance window due so far. Protection runs to 2032.
Method for Preparing Rare-Earth Permanent Magnetic Material with Grain Boundary Diffusion Using Composite Target by Vapor Deposition
US 10,385,442
The newest of the three, granted 2019. It anchors the portfolio to 2035, 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 Dec 9, 2026The maintenance fee for Iron-Based Amorphous Alloy Broad Ribbon and Its Manufacturing Method (US 9,053,847) comes due Dec 9, 2026. Unpaid by Jun 9, 2027, it lapses early.
- 2 fees due Feb 20, 2027
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
What they patent
Grouped by real patent family, largest first, labeled by the earliest filing in each. No technology classification is inferred from titles.
| Rare Earth Permanent Magnet Material and Preparation Method Thereof | 1 in force | to Jan 2040 |
| Powder metallurgy wear-resistant tool steel | 1 in force | to Jul 2036 |
| Spray-formed high-speed steel | 1 in force | to Apr 2036 |
| Method for Preparing Rare-Earth Permanent Magnetic Material with Grain Boundary Diffusion Using Composite Target by Vapor Deposition | 1 in force | to Dec 2035 |
| Iron-Based Amorphous Alloy Broad Ribbon and Its Manufacturing Method | 1 in force | to Sep 2032 |
Patents held now
Soonest term end first.
Showing 1 to 5 of 5
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,053,847 | Iron-Based Amorphous Alloy Broad Ribbon and Its Manufacturing Method In force · High confidence | In force | High confidence | |
| US 10,385,442 | Method for Preparing Rare-Earth Permanent Magnetic Material with Grain Boundary Diffusion Using Composite Target by Vapor Deposition In force · High confidence | In force | High confidence | |
| US 10,233,519 | Spray-formed high-speed steel In force · High confidence | In force | High confidence | |
| US 10,385,428 | Powder metallurgy wear-resistant tool steel In force · High confidence | In force | High confidence | |
| US 11,984,258 | Rare Earth Permanent Magnet Material and Preparation Method Thereof In force · High confidence | In force | High confidence |
Also on record, not counted in the 5: 3 applications pending · 1 application 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.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.