4D-S, Ltd.
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
0
Ending by 2030
Mar 2031
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 Resistive memory device having a template layer (US 10,319,907) comes due Dec 11, 2026. Unpaid by Jun 11, 2027, it lapses early.
- 1 fee due Feb 13, 2027The maintenance fee for Resistive memory device having a retention layer (US 10,381,558) comes due Feb 13, 2027. Unpaid by Aug 13, 2027, 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.
Showing 1 to 6 of 6
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,709,891 | Method and system for utilizing Perovskite material for charge storage and as a dielectric In force · From the USPTO record | In force | From the USPTO record | |
| US 9,634,247 | Complementary metal oxide heterojunction memory devices and methods related thereto In force (reinstated) · From the USPTO record | In force (reinstated) | From the USPTO record | |
| US 10,319,907 | Resistive memory device having a template layer In force · From the USPTO record | In force | From the USPTO record | |
| US 10,381,558 | Resistive memory device having a retention layer In force · From the USPTO record | In force | From the USPTO record | |
| US 10,734,576 | Resistive memory device having ohmic contacts In force · From the USPTO record | In force | From the USPTO record | |
| US 10,833,262 | Resistive memory device having a conductive barrier layer In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 6: 2 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.
4 no status recorded