43 patents currently held
49 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.
The next term ends in Nov 2034. from the record
Of the 49 now held by other companies, 47 name Eht Ventures LLC as their current owner, and 2 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Nov 2034
Next term end
9
Patent families
When these terms end
Held patents by the year their term ends
notable patents
all others
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jul 2039 · High confidence
Also notable
Ends Jul 2041 · High confidence
Also notable
Ends Jun 2042 · High confidence
Nanosecond Pulser Pulse Generation
US 10,892,141
The most cited patent in this portfolio, cited by 120 later US patents, top 1% of utility patents granted in 2021 in our data. Protection runs to 2039.
Ion Current Droop Compensation
US 11,404,247
Cited by 10 later US patents, top 25% of utility patents granted in 2022 in our data. Protection runs to 2041.
Bipolar High Voltage Pulser
US 11,824,542
Cited by 5 later US patents, top 25% of utility patents granted in 2023 in our data. Protection runs to 2042.
Formerly held, still cited
Notable
Ends Mar 2035 · High confidence
Cited by 122 later US patents, top 1% of utility patents granted in 2021 in our data. Protection runs to 2035. A terminal disclaimer caps this term to an earlier patent's.
now held by Eht Ventures LLC
Also notable
Ends Aug 2033 · High confidence
Cited by 176 later US patents, top 5% of utility patents granted in 2015 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2033.
now held by Eht Ventures LLC
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 15, 2027The maintenance fee for Ion Current Droop Compensation (US 11,728,138) comes due Feb 15, 2027. Unpaid by Aug 16, 2027, it lapses early.
- 3 fees due May 7 to 21, 2027 · next May 7
- 1 fee due Jul 16, 2027The maintenance fee for Efficient Energy Recovery in a Nanosecond Pulser Circuit (US 11,875,971) comes due Jul 16, 2027. Unpaid by Jan 18, 2028, it lapses early.
- 1 fee due Oct 23, 2027The maintenance fee for Ion Current Droop Compensation (US 11,967,484) comes due Oct 23, 2027. Unpaid by Apr 24, 2028, it lapses early.
Recent changes
- 1 of the patents on this record was granted since Aug 17, 2026
What they patent
The 5 largest of its 9 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Arbitarary Waveform Generation Using Nanosecond Pulses | 31 in force | to Dec 2040 |
| Ion Current Droop Compensation | 4 in force | to Feb 2042 |
| Efficient Nanosecond Pulser with Source and Sink Capability for Plasma Control Applications | 2 in force | to Jan 2040 |
| High Frequency RF Generator and DC Pulsing | 1 in force | to Sep 2043 |
| Bipolar High Voltage Pulser | 1 in force | to Jun 2042 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 11,558,048 | High Voltage Nanosecond Pulser In force · High confidence | In force | High confidence | |
| US 11,824,454 | Wafer Biasing in a Plasma Chamber In force · High confidence | In force | High confidence | |
| US 10,320,373 | RF Production Using Nonlinear Semiconductor Junction Capacitance In force · High confidence | In force | High confidence | |
| US 10,304,661 | Arbitarary Waveform Generation Using Nanosecond Pulses In force · High confidence | In force | High confidence | |
| US 10,777,388 | Arbitrary Waveform Generation Using Digital Pulses In force · High confidence | In force | High confidence | |
| US 11,387,076 | Apparatus and Method of Generating a Waveform In force · High confidence | In force | High confidence | |
| US 11,658,007 | Apparatus and Method of Generating a Waveform In force · Medium confidence | In force | Medium confidence | |
| US 11,222,767 | Nanosecond Pulser Bias Compensation In force · High confidence | In force | High confidence | |
| US 12,230,477 | Nanosecond Pulser Adc System In force · High confidence | In force | High confidence | |
| US 11,551,908 | Spatially Variable Wafer Bias Power System In force · Medium confidence | In force | Medium confidence |
Also on record, not counted in the 43: 49 patents in force now held by others · 13 applications pending · 2 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.