Ess Tech, Inc.
2 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.
9
Ending by 2030
Feb 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.
- 1 fee due Nov 30, 2026The maintenance fee for Methods and system for redox flow battery idle state (US 11,664,512) comes due Nov 30, 2026. Unpaid by Jun 1, 2027, it lapses early.
- 4 fees due Dec 6 to 27, 2026 · next Dec 6
- 1 fee due Jan 25, 2027The maintenance fee for Redox flow battery and battery system (US 11,710,843) comes due Jan 25, 2027. Unpaid by Jul 26, 2027, it lapses early.
- 2 fees due Feb 1 to 15, 2027 · next Feb 1
- 5 fees due Mar 3 to 19, 2027 · next Mar 3
- 2 fees due Apr 1 to 17, 2027 · next Apr 1
- 3 fees due May 7 to 14, 2027 · next May 7
- 3 fees due Jun 5 to 26, 2027 · next Jun 5
- 1 fee due Jul 30, 2027The maintenance fee for Methods and system for rebalancing electrolytes in a redox flow battery system (US 11,888,201) comes due Jul 30, 2027. Unpaid by Jan 31, 2028, it lapses early.
- 1 fee due Aug 16, 2027The maintenance fee for Suppression of fixed-pattern jitter using FIR filters (US 9,264,019) comes due Aug 16, 2027. Unpaid by Feb 16, 2028, it lapses early.
- 3 fees due Sep 10 to 15, 2027 · next Sep 10
- 2 fees due Oct 7 to 26, 2027 · next Oct 7
- 1 fee due Nov 12, 2027The maintenance fee for Determination of environmental effects on electrical load devices (US 10,652,649) comes due Nov 12, 2027. Unpaid by May 12, 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 7,551,741 | System and method for 3D sound processing In force · From the USPTO record | In force | From the USPTO record | |
| US 8,732,510 | Digital forced oscilation by direct digital synthesis to generate pulse stream having frequency relative to a reference clock signal and to eliminate an off-chip filter In force · From the USPTO record | In force | From the USPTO record | |
| US 7,436,333 | Asynchronous sample rate converter In force · From the USPTO record | In force | From the USPTO record | |
| US 7,680,173 | Spread spectrum clock generator having an adjustable delay line In force · From the USPTO record | In force | From the USPTO record | |
| US 7,800,145 | Method and Apparatus for Controlling Charge Transfer in CMOS Sensors with a Transfer Gate Work Function In force · High confidence | In force | High confidence | |
| US 8,774,749 | Virtual weaver architecture filter In force · From the USPTO record | In force | From the USPTO record | |
| US 9,490,774 | Channel Select Filter Apparatus and Method In force · High confidence | In force | High confidence | |
| US 8,766,841 | Impedance network for producing a weighted sum of inputs In force · From the USPTO record | In force | From the USPTO record | |
| US 7,953,782 | Digital forced oscillation by direct digital synthesis In force · From the USPTO record | In force | From the USPTO record | |
| US 8,350,734 | Method and apparatus for digital to analog conversion of data stream with random and low-frequency periodic jitter In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 109: 2 patents in force now held by others · 81 lapsed for an unpaid fee · 45 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.
12 pending · 11 abandoned · 64 no status recorded