Dowa Electronics Materials Co., Ltd.
7 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.
Recorded under 6 name spellings.
48
Ending by 2030
Nov 2026
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
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 11, 2026The maintenance fee for Wafer group, wafer manufacturing device, and wafer manufacturing method (US 10,319,807) comes due Dec 11, 2026. Unpaid by Jun 11, 2027, it lapses early.
- 3 fees due Jan 4 to 14, 2027 · next Jan 4
- 3 fees due Feb 13 to 20, 2027 · next Feb 13
- 7 fees due Apr 20 to 30, 2027 · next Apr 20
- 3 fees due May 12 to 24, 2027 · next May 12
- 2 fees due Jun 10 to 15, 2027 · next Jun 10
- 4 fees due Jul 9 to 30, 2027 · next Jul 9
- 6 fees due Aug 2 to 25, 2027 · next Aug 2
- 5 fees due Sep 1 to 15, 2027 · next Sep 1
- 2 fees due Oct 14 to 19, 2027 · next Oct 14
- 1 fee due Nov 3, 2027The maintenance fee for Carrier core particle for electrophotographic developer, method for manufacturing the same, carrier for electrophotographic developer and electrophotographic developer (US 9,329,514) comes due Nov 3, 2027. Unpaid by May 3, 2028, it lapses early.
Recent changes
- 5 of the patents on this record were granted since Aug 16, 2026
- 4 terms have ended since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,282,702 | Silver powder and method for producing same In force · From the USPTO record | In force | From the USPTO record | |
| US 7,534,283 | Method of producing copper powder and copper powder In force · From the USPTO record | In force | From the USPTO record | |
| US 7,771,849 | Method of Reducing Dislocations in Group III Nitride Crystal, and Substrate for Epitaxial Growth In force · High confidence | In force | High confidence | |
| US 7,989,799 | Surface light emitting element In force · From the USPTO record | In force | From the USPTO record | |
| US 7,781,082 | Magnetic Material In force · High confidence | In force | High confidence | |
| US 8,044,439 | Light-emitting device and manufacturing method of the same In force · From the USPTO record | In force | From the USPTO record | |
| US 8,072,365 | Magnetic Crystal for Electromagnetic Wave Absorbing Material and Electromagnetic Wave Absorber In force · High confidence | In force | High confidence | |
| US 7,585,588 | Battery positive electrode material In force · From the USPTO record | In force | From the USPTO record | |
| US 7,771,872 | Silver oxide powder for alkaline battery and method of producing the same In force · From the USPTO record | In force | From the USPTO record | |
| US D703,862 | Lighting elements In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 206: 7 patents in force now held by others · 110 lapsed for an unpaid fee · 31 ended at full term · 4 surrendered on reissue. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
18 pending · 9 abandoned · 73 no status recorded