Permasense Limited

8 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

Sep 2029

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 Jul 21, 2027
The maintenance fee for Electromagnetic acoustic transducer (US 10,537,916) comes due Jul 21, 2027. Unpaid by Jan 21, 2028, it lapses early.
1 fee due Oct 21, 2027
The maintenance fee for Ultrasonic detection of a change in a surface of a wall (US 10,627,371) comes due Oct 21, 2027. Unpaid by Apr 21, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

4 terms have ended since Aug 16, 2026

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.

Showing 1 to 8 of 8

Patent	Title	Status	Expires	Confidence
US 8,381,592	Ultrasonic non-destructive testing In force Term ends Sep 15, 2029 · From the USPTO record	In force	Term ends Sep 15, 2029	From the USPTO record
US 10,627,371	Ultrasonic detection of a change in a surface of a wall In force Ends no later than Mar 26, 2034 · From the USPTO record	In force	Ends no later than Mar 26, 2034	From the USPTO record
US 10,247,704	Ultrasonic Detection of a Change in a Surface of a Wall In force Term ends May 11, 2035 · High confidence	In force	Term ends May 11, 2035	High confidence
US 10,537,916	Electromagnetic acoustic transducer In force Term ends Feb 10, 2036 · From the USPTO record	In force	Term ends Feb 10, 2036	From the USPTO record
US 8,783,110	Ultrasonic non-destructive testing In force Term ended Sep 14, 2026 · From the USPTO record	In force	Term ended Sep 14, 2026	From the USPTO record
US 8,789,419	Ultrasonic non-destructive testing In force Ended no later than Sep 14, 2026 · From the USPTO record	In force	Ended no later than Sep 14, 2026	From the USPTO record
US 9,274,090	Ultrasonic non-destructive testing In force Ended no later than Sep 14, 2026 · From the USPTO record	In force	Ended no later than Sep 14, 2026	From the USPTO record
US 9,599,593	Ultrasonic non-destructive testing In force Ended no later than Sep 14, 2026 · From the USPTO record	In force	Ended no later than Sep 14, 2026	From the USPTO record

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

Every application published under this name has become a patent.