Sra Developments Limited

9 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

Apr 2027

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 May 3, 2027
The maintenance fee for Ultrasonic surgical tool (US 9,173,672) comes due May 3, 2027. Unpaid by Nov 3, 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.

Showing 1 to 9 of 9

Patent	Title	Status	Expires	Confidence
US D681,206	Ultrasonic generator In force Term ends Apr 30, 2027 · From the USPTO record	In force	Term ends Apr 30, 2027	From the USPTO record
US 8,009,508	Ultrasonic generator system In force Term ends May 15, 2027 · From the USPTO record	In force	Term ends May 15, 2027	From the USPTO record
US 8,242,398	Switch for ultrasonic surgical tool In force Term ends Mar 20, 2029 · From the USPTO record	In force	Term ends Mar 20, 2029	From the USPTO record
US 9,474,542	Ultrasonic transducer system In force Term ends Nov 27, 2029 · From the USPTO record	In force	Term ends Nov 27, 2029	From the USPTO record
US 8,668,710	Ultrasonic tissue dissector In force Term ends Mar 6, 2030 · From the USPTO record	In force	Term ends Mar 6, 2030	From the USPTO record
US 9,173,672	Ultrasonic surgical tool In force Term ends Jun 23, 2030 · From the USPTO record	In force	Term ends Jun 23, 2030	From the USPTO record
US 9,358,030	Ultrasonic surgical tool In force Term ends Oct 20, 2030 · From the USPTO record	In force	Term ends Oct 20, 2030	From the USPTO record
US 8,836,200	Torsional mode ultrasonic generator In force Term ends Aug 2, 2031 · From the USPTO record	In force	Term ends Aug 2, 2031	From the USPTO record
US 9,655,601	Ergonomic handpiece for laparoscopic and open surgery In force Term ends Oct 24, 2031 · From the USPTO record	In force	Term ends Oct 24, 2031	From the USPTO record

Also on record, not counted in the 9: 1 lapsed for an unpaid fee · 6 ended at full term. 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.

Export every term end as CSV · Pro

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

List them