354 patents currently held
23 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 2026. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
27
Ending by 2030
Nov 2026
Next term end
291
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 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. 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 Mar 2034 · High confidence
Also notable
Ends Sep 2038 · High confidence
Also notable
Ends May 2034 · High confidence
Method and System for Separating Seismic Sources in Marine Simultaneous Shooting Acquisition
US 9,075,162
Cited by 21 later US patents, top 25% of utility patents granted in 2015 in our data, and renewed at every maintenance window due so far. Protection runs to 2034.
Seismic Surveys with Increased Shot Point Intervals for Far Offsets
US 10,871,588
Cited by 10 later US patents, top 25% of utility patents granted in 2020 in our data. Protection runs to 2038.
Piston Integrated Variable Mass Load
US 9,341,725
The largest patent family in this portfolio, 7 related applications, renewed at every maintenance window due so far. Protection runs to 2034.
Formerly held, still cited
Notable
Ends Aug 2028 · High confidence
Cited by 33 later US patents, top 25% of utility patents granted in 2010 in our data, and renewed at 3 of 3 maintenance windows. Protection runs to 2028.
now held by Ocean Floor Geophysics, Inc.
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.
- 2 fees due Dec 4 to 11, 2026 · next Dec 4
- 12 fees due Jan 2 to 25, 2027 · next Jan 2
- 4 fees due Feb 13 to 27, 2027 · next Feb 13
- 6 fees due Mar 3 to 10, 2027 · next Mar 3
- 7 fees due Apr 1 to 30, 2027 · next Apr 1
- 10 fees due May 5 to 26, 2027 · next May 5
- 7 fees due Jun 3 to 30, 2027 · next Jun 3
- 6 fees due Jul 9 to 30, 2027 · next Jul 9
- 7 fees due Aug 2 to 27, 2027 · next Aug 2
- 8 fees due Sep 3 to 30, 2027 · next Sep 3
- 4 fees due Oct 12 to 26, 2027 · next Oct 12
- 2 fees due Nov 3 to 12, 2027 · next Nov 3
Recent changes
- 2 terms have ended since Aug 17, 2026
What they patent
The 5 largest of its 291 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Low Frequency Marine Acoustic Vibrator | 5 in force | to Sep 2035 |
| Method and System for Separating Seismic Sources in Marine Simultaneous Shooting Acquisition | 4 in force | to Mar 2034 |
| Method and System of a Marine Geophysical Survey Cable Retriever | 4 in force | to Jun 2032 |
| Seismic Data Acquisition | 3 in force | to Apr 2036 |
| Compliance Chambers for Marine Vibrators | 3 in force | to Feb 2036 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,460,434 | Marine Seismic Streamer Having Soluble Encapsulant Surrounding Seismic Sensors Therein In force · High confidence | In force | High confidence | |
| US 7,518,953 | Method for Detecting Air Gun Faults in a Marine Seismic Source Array In force · High confidence | In force | High confidence | |
| US 7,609,585 | Method for Sub-Salt Migration Velocity Analysis In force · High confidence | In force | High confidence | |
| US 7,835,225 | Method for Attenuating Particle Motion Sensor Noise in Dual Sensor Towed Marine Seismic Streamers In force · High confidence | In force | High confidence | |
| US 7,565,245 | Electromagnetic Surveying In force · High confidence | In force | High confidence | |
| US 7,446,535 | Electrode Structure and Streamer Made Therewith for Marine Electromagnetic Surveying In force · High confidence | In force | High confidence | |
| US 7,646,671 | Method for Processing Marine Towed Streamer Seismic Data from Regular Multi-Azimuth Surveys In force · High confidence | In force | High confidence | |
| US 7,646,672 | Method for Wavefield Separation in 3D Dual Sensor Towed Streamer Data with Aliased Energy in Cross-Streamer Direction In force · High confidence | In force | High confidence | |
| US 7,663,972 | Method for Three Dimensional Seismic Travel Time Tomography in Transversely Isotropic Media In force · High confidence | In force | High confidence | |
| US 8,099,239 | Electromagnetic Surveying for Resistive or Conductive Bodies In force · High confidence | In force | High confidence |
Also on record, not counted in the 354: 23 patents in force now held by others · 207 patents ended · 11 applications pending · 112 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.