Stax Engineering, Inc.

11 patents currently held · Updated Nov 14, 2026

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

Recorded under 2 name spellings.

Ending by 2030

Nov 2037

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 24, 2027
The maintenance fee for Liquid Conservation Device for an Exhaust Treatment (US 10,513,957) comes due Jun 24, 2027. Unpaid by Dec 27, 2027, it lapses early.
1 fee due Aug 4, 2027
The maintenance fee for Sectioned Exhaust Filter System (US 10,550,748) comes due Aug 4, 2027. Unpaid by Feb 4, 2028, 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 10,513,957	Liquid Conservation Device for an Exhaust Treatment In force Term ends Nov 17, 2037 · High confidence	In force	Term ends Nov 17, 2037	High confidence
US 10,960,958	Device and Method for Securing a Watercraft In force Term ends Nov 29, 2037 · High confidence	In force	Term ends Nov 29, 2037	High confidence
US 10,550,748	Sectioned Exhaust Filter System In force Term ends Dec 2, 2037 · High confidence	In force	Term ends Dec 2, 2037	High confidence
US 11,371,405	Road-Transportable Genset Emissions Reduction System In force Term ends Nov 26, 2038 · High confidence	In force	Term ends Nov 26, 2038	High confidence
US 10,953,960	Self-Propelled Emissions Control Servicing Watercraft In force Term ends Mar 17, 2039 · High confidence	In force	Term ends Mar 17, 2039	High confidence
US 10,970,927	Positionable Emissions Control Watercraft In force Term ends Apr 16, 2039 · High confidence	In force	Term ends Apr 16, 2039	High confidence
US 11,066,971	Transportable Genset Emissions Reduction System In force Term ends Apr 29, 2039 · High confidence	In force	Term ends Apr 29, 2039	High confidence
US 12,071,205	Emissions Control Watercraft In force Term ends Aug 29, 2039 · Medium confidence	In force	Term ends Aug 29, 2039	Medium confidence
US 11,325,687	Multiple Duct System for Conveying Exhaust Gas from Oceangoing Vessels to a Treatment System In force Term ends May 19, 2041 · High confidence	In force	Term ends May 19, 2041	High confidence
US 11,345,455	Apparatus for Emissions Reduction as a Service (ERaaS) In force Term ends Sep 8, 2041 · High confidence	In force	Term ends Sep 8, 2041	High confidence

10 of 11 patents shown.

Pro members see all 11.

Pro members: see all 11 patents

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.

2 pending

List them