Differential Dynamics Corporation
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 2 name spellings.
12
Ending by 2030
Jul 2030
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 Feb 13, 2027The maintenance fee for Commutator-less and brush-less direct current generator and applications for generating power to an electric power system (US 10,378,506) comes due Feb 13, 2027. Unpaid by Aug 13, 2027, it lapses early.
- 2 fees due Apr 6 to 27, 2027 · next Apr 6
- 1 fee due Oct 5, 2027The maintenance fee for Three variable and four variable transgear assemblies (US 9,303,733) comes due Oct 5, 2027. Unpaid by Apr 5, 2028, it lapses early.
Recent changes
Nothing was recorded against this company's patents in the last 90 days.
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 8,986,149 | Infinitely Variable Direction Control In force · Medium confidence | In force | Medium confidence | |
| US 8,992,370 | Infinitely variable pumps and compressors In force · From the USPTO record | In force | From the USPTO record | |
| US 9,017,208 | Infinitely variable motion control (IVMC) for generators, transmissions and pumps/compressors In force · From the USPTO record | In force | From the USPTO record | |
| US 9,151,269 | Run-of-the-river or ocean current turbine In force (reinstated) · From the USPTO record | In force (reinstated) | From the USPTO record | |
| US 9,303,733 | Three variable and four variable transgear assemblies In force · From the USPTO record | In force | From the USPTO record | |
| US 9,476,401 | Marine hydrokinetic turbine In force · From the USPTO record | In force | From the USPTO record | |
| US 10,378,506 | Commutator-less and brush-less direct current generator and applications for generating power to an electric power system In force · From the USPTO record | In force | From the USPTO record | |
| US 10,815,968 | Concentric wing turbines In force · From the USPTO record | In force | From the USPTO record | |
| US 10,941,749 | Speed converter-controlled river turbines In force · From the USPTO record | In force | From the USPTO record | |
| US 10,947,956 | Expandable power marine hydrokinetic turbines, pumps, compressors and transmissions In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 15: 14 lapsed for an unpaid fee · 4 ended at full term. 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.
1 pending