Quest Engines, LLC

16 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

Feb 2038

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 7, 2027
The maintenance fee for Internal combustion engine (US 10,526,953) comes due Jul 7, 2027. Unpaid by Jan 7, 2028, it lapses early.
3 fees due Sep 17 to 24, 2027 · next Sep 17

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 10,465,629	Internal Combustion Engine Having Piston with Deflector Channels and Complementary Cylinder Head In force Term ends Feb 23, 2038 · High confidence	In force	Term ends Feb 23, 2038	High confidence
US 10,590,813	Internal combustion engine In force Term ends Feb 23, 2038 · From the USPTO record	In force	Term ends Feb 23, 2038	From the USPTO record
US 10,724,428	Variable volume chamber device In force Term ends Feb 23, 2038 · From the USPTO record	In force	Term ends Feb 23, 2038	From the USPTO record
US 11,434,904	Variable volume chamber device In force Term ends Feb 23, 2038 · From the USPTO record	In force	Term ends Feb 23, 2038	From the USPTO record
US 11,041,456	Internal combustion engine In force Term ends May 16, 2038 · From the USPTO record	In force	Term ends May 16, 2038	From the USPTO record
US 10,598,285	Piston sealing system In force Term ends May 30, 2038 · From the USPTO record	In force	Term ends May 30, 2038	From the USPTO record
US 10,590,834	Internal combustion engine In force Term ends Jun 3, 2038 · From the USPTO record	In force	Term ends Jun 3, 2038	From the USPTO record
US 10,526,953	Internal combustion engine In force Term ends Jul 13, 2038 · From the USPTO record	In force	Term ends Jul 13, 2038	From the USPTO record
US 10,989,138	Internal combustion engine In force Term ends Oct 1, 2038 · From the USPTO record	In force	Term ends Oct 1, 2038	From the USPTO record
US 10,883,498	Variable volume chamber for interaction with a fluid In force Term ends Dec 23, 2038 · From the USPTO record	In force	Term ends Dec 23, 2038	From the USPTO record

10 of 16 patents shown.

Pro members see all 16.

Pro members: see all 16 patents

Also on record, not counted in the 16: 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.