Darfon Electronics Corp.
10 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 7 name spellings.
10
Ending by 2030
Sep 2027
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.
- 4 fees due Dec 4 to 27, 2026 · next Dec 4
- 2 fees due Jan 18 to 25, 2027 · next Jan 18
- 8 fees due Feb 4 to 28, 2027 · next Feb 4
- 4 fees due Mar 19 to 29, 2027 · next Mar 19
- 2 fees due Apr 1 to 10, 2027 · next Apr 1
- 6 fees due May 3 to 28, 2027 · next May 3
- 2 fees due Jun 26, 2027
- 6 fees due Jul 2 to 23, 2027 · next Jul 2
- 3 fees due Aug 23 to 27, 2027 · next Aug 23
- 3 fees due Sep 5 to 26, 2027 · next Sep 5
- 3 fees due Oct 2 to 28, 2027 · next Oct 2
- 2 fees due Nov 7, 2027
Recent changes
- 4 of the patents on this record were granted since Aug 16, 2026
- 3 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 7,541,554 | Key structure In force · From the USPTO record | In force | From the USPTO record | |
| US D692,432 | Casing with foldable keyboard In force · From the USPTO record | In force | From the USPTO record | |
| US 7,557,313 | Keyswitch and keyoard In force · From the USPTO record | In force | From the USPTO record | |
| US 7,572,996 | Keyswitch structure In force · From the USPTO record | In force | From the USPTO record | |
| US 7,709,762 | Keyboard In force · From the USPTO record | In force | From the USPTO record | |
| US 7,994,446 | Key mechanisms In force · From the USPTO record | In force | From the USPTO record | |
| US 7,973,254 | Key structure In force · From the USPTO record | In force | From the USPTO record | |
| US 8,124,886 | Membrane circuit board In force · From the USPTO record | In force | From the USPTO record | |
| US 8,231,236 | Input apparatus and light guiding plate thereof In force · From the USPTO record | In force | From the USPTO record | |
| US 9,269,509 | Backlight module and lighting keyboard In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 208: 10 patents in force now held by others · 177 lapsed for an unpaid fee · 40 ended at full term · 2 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.
15 pending · 137 no status recorded