27 patents currently held
72 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 Mar 2033. from the record
Of the 72 now held by other companies, 72 name Quantum Wave LLC as their current owner. Each row says so.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
Mar 2033
Next term end
18
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 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. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Feb 2035 · High confidence
Also notable
Ends May 2035 · High confidence
Also notable
Ends Jun 2035 · High confidence
Excitation and Use of Guided Surface Wave Modes on Lossy Media
US 9,912,031
Cited by 106 later US patents, top 5% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2035.
Excitation and Use of Guided Surface Wave Modes on Lossy Media
US 9,910,144
Cited by 106 later US patents, top 5% of utility patents granted in 2018 in our data, and renewed at every maintenance window due so far. Protection runs to 2035.
Excitation and Use of Guided Surface Waves
US 10,193,595
Cited by 15 later US patents, top 25% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2035. A terminal disclaimer caps this term to an earlier patent's.
Formerly held, still cited
Notable
Ends Dec 2030 · High confidence
Cited by 84 later US patents, top 5% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2030.
now held by Quantum Wave, 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 Jan 16, 2027The maintenance fee for Simultaneous Multifrequency Receive Circuits (US 10,355,481) comes due Jan 16, 2027. Unpaid by Jul 16, 2027, it lapses early.
- 1 fee due May 5, 2027The maintenance fee for Global Emergency and Disaster Transmission (US 10,467,876) comes due May 5, 2027. Unpaid by Nov 5, 2027, it lapses early.
- 2 fees due Aug 11, 2027
- 1 fee due Sep 24, 2027The maintenance fee for Mobile Guided Surface Waveguide Probes and Receivers (US 10,601,099) comes due Sep 24, 2027. Unpaid by Mar 24, 2028, it lapses early.
- 1 fee due Oct 21, 2027The maintenance fee for Adjustment of Guided Surface Waveguide Probe Operation (US 10,630,111) comes due Oct 21, 2027. Unpaid by Apr 21, 2028, it lapses early.
Recent changes
- 2 terms have ended since Aug 16, 2026
What they patent
The 5 largest of its 18 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Simultaneous Multifrequency Receive Circuits | 3 in force | to May 2036 |
| Excitation and Use of Guided Surface Wave Modes on Lossy Media (2014) | 3 in force | to Mar 2036 |
| Excitation and Use of Guided Surface Wave Modes on Lossy Media (2013) | 3 in force | to Feb 2035 |
| Anisotropic Constitutive Parameters for Launching a Zenneck Surface Wave | 2 in force | to Jul 2040 |
| Variable Frequency Receivers for Guided Surface Wave Transmissions | 2 in force | to Dec 2035 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 10,680,306 | Excitation and Use of Guided Surface Wave Modes on Lossy Media In force · High confidence | In force | High confidence | |
| US 11,258,152 | Excitation and Use of Guided Surface Wave Modes on Lossy Media In force · High confidence | In force | High confidence | |
| US 10,224,589 | Excitation and Use of Guided Surface Wave Modes on Lossy Media In force · Medium confidence | In force | Medium confidence | |
| US 10,998,604 | Excitation and Use of Guided Surface Wave Modes on Lossy Media In force · Medium confidence | In force | Medium confidence | |
| US 9,912,031 | Excitation and Use of Guided Surface Wave Modes on Lossy Media In force · High confidence | In force | High confidence | |
| US 10,467,876 | Global Emergency and Disaster Transmission In force · High confidence | In force | High confidence | |
| US 9,910,144 | Excitation and Use of Guided Surface Wave Modes on Lossy Media In force · High confidence | In force | High confidence | |
| US 10,193,595 | Excitation and Use of Guided Surface Waves In force · High confidence | In force | High confidence | |
| US 9,923,385 | Excitation and Use of Guided Surface Waves In force · High confidence | In force | High confidence | |
| US 10,135,298 | Variable Frequency Receivers for Guided Surface Wave Transmissions In force · High confidence | In force | High confidence |
Also on record, not counted in the 27: 72 patents in force now held by others · 8 patents ended · 39 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.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.