Torsch Inc.

11 patents currently held · Updated Nov 15, 2026

1 more in force is now held by another company

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

Ending by 2030

Jul 2035

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 Jun 26, 2027
The maintenance fee for Sleeve valve (US 11,851,986) comes due Jun 26, 2027. Unpaid by Dec 27, 2027, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 term has ended since Aug 17, 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.

Patent	Title	Status	Expires	Confidence
US 9,689,236	Liner hanger In force Term ends Jul 3, 2035 · From the USPTO record	In force	Term ends Jul 3, 2035	From the USPTO record
US 10,364,647	Method and apparatus for controlling fluid flow through a down hole tool In force Term ends Dec 27, 2035 · From the USPTO record	In force	Term ends Dec 27, 2035	From the USPTO record
US 10,989,007	Downhole casing patch In force Term ends Jul 13, 2037 · From the USPTO record	In force	Term ends Jul 13, 2037	From the USPTO record
US 11,384,621	Automatic flow control valve In force Term ends May 23, 2039 · From the USPTO record	In force	Term ends May 23, 2039	From the USPTO record
US 11,499,400	Punch mechanism In force Term ends Jun 12, 2039 · From the USPTO record	In force	Term ends Jun 12, 2039	From the USPTO record
US 11,851,986	Sleeve valve In force Term ends Nov 25, 2039 · From the USPTO record	In force	Term ends Nov 25, 2039	From the USPTO record
US 11,686,169	Pump down assist apparatus In force Term ends Aug 18, 2041 · From the USPTO record	In force	Term ends Aug 18, 2041	From the USPTO record
US 11,761,305	Downhole Degradable Staging Tool In force Term ends Dec 1, 2041 · High confidence	In force	Term ends Dec 1, 2041	High confidence
US 12,123,281	Barrier Member In force Term ends Mar 18, 2042 · High confidence	In force	Term ends Mar 18, 2042	High confidence
US 12,497,868	Apparatus and method for stimulating a well In force Term ends Jul 25, 2042 · From the USPTO record	In force	Term ends Jul 25, 2042	From the USPTO record

10 of 11 patents shown.

Pro members see all 11.

Pro members: see all 11 patents

Also on record, not counted in the 11: 1 patent in force now held by others · 1 lapsed for an unpaid fee. 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

Every application published under this name has become a patent.