Geotech Ltd.

18 patents currently held · Updated Nov 14, 2026

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

Ending by 2030

Dec 2026

Next term end

When these terms end

5 yrs10 yrs20 yrs

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 Feb 6, 2027
The maintenance fee for Systems and methods for improving the functionality of optically pumped magnetometer in self-oscillating mode (US 10,371,766) comes due Feb 6, 2027. Unpaid by Aug 6, 2027, it lapses early.

Which patents, and when each one lapses · Pro

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 7,681,831	Suspension net for airborne surveying In force Term ends Dec 14, 2026 · From the USPTO record	In force	Term ends Dec 14, 2026	From the USPTO record
US 8,362,779	Double-suspension receiver coil system and apparatus In force Term ends Oct 5, 2028 · From the USPTO record	In force	Term ends Oct 5, 2028	From the USPTO record
US 8,766,640	Airborne time domain electromagnetic transmitter coil system and appratus In force Term ends Nov 30, 2028 · From the USPTO record	In force	Term ends Nov 30, 2028	From the USPTO record
US 8,786,286	Bucking coil and B-field measurement system and apparatus for time domain electromagnetic measurements In force Term ends Aug 28, 2029 · From the USPTO record	In force	Term ends Aug 28, 2029	From the USPTO record
US 8,030,933	Double-suspension receiver coil system and apparatus In force Term ends Sep 28, 2029 · From the USPTO record	In force	Term ends Sep 28, 2029	From the USPTO record
US 8,674,701	Airborne electromagnetic transmitter coil system In force Term ends Oct 2, 2029 · From the USPTO record	In force	Term ends Oct 2, 2029	From the USPTO record
US 7,948,237	Large airborne time-domain electromagnetic transmitter coil system and apparatus In force Term ends Oct 29, 2029 · From the USPTO record	In force	Term ends Oct 29, 2029	From the USPTO record
US 8,847,599	Aerodynamically stabilized tow assembly for aircraft for geophysical surveying In force Ends no later than Oct 22, 2030 · From the USPTO record	In force	Ends no later than Oct 22, 2030	From the USPTO record
US 8,289,023	Geophysical prospecting using rotationally invariant parameters of natural electromagnetic fields In force Term ends Nov 28, 2030 · From the USPTO record	In force	Term ends Nov 28, 2030	From the USPTO record
US 8,358,135	Multiple receiver coil system for geophysical prospecting In force Term ends May 7, 2031 · From the USPTO record	In force	Term ends May 7, 2031	From the USPTO record

10 of 18 patents shown.

Pro members see all 18.

Pro members: see all 18 patents

Also on record, not counted in the 18: 4 lapsed for an unpaid fee · 4 ended at full term · 1 surrendered on reissue. 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.

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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.

1 no status recorded

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