Proprietect L.P.

21 patents currently held · Updated Nov 15, 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

Jan 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 Mar 5, 2027
The maintenance fee for Vented mold (US 11,745,400) comes due Mar 5, 2027. Unpaid by Sep 7, 2027, it lapses early.
1 fee due Apr 1, 2027
The maintenance fee for Vehicular seat element (US 10,427,571) comes due Apr 1, 2027. Unpaid by Oct 1, 2027, it lapses early.
1 fee due Jun 3, 2027
The maintenance fee for Ventilated seat element (US 10,493,879) comes due Jun 3, 2027. Unpaid by Dec 3, 2027, it lapses early.
2 fees due Sep 12, 2027

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 7,481,637	Vented Mold and Method for Producing Molded Article In force Term ends Jan 16, 2027 · High confidence	In force	Term ends Jan 16, 2027	High confidence
US 7,878,785	Vented Mold and Method for Producing Molded Article In force Term ends Jan 16, 2027 · High confidence	In force	Term ends Jan 16, 2027	High confidence
US 8,287,040	Vehicular Seat System and Vehicular Headrest In force Term ends Jul 31, 2029 · High confidence	In force	Term ends Jul 31, 2029	High confidence
US 12,679,065	Process for Production of Foam Laminate Product In force Term ends Aug 15, 2030 · Medium confidence	In force	Term ends Aug 15, 2030	Medium confidence
US 11,214,647	Process for producing a low density free-rise polyurethane foam In force Term ends Oct 10, 2033 · From the USPTO record	In force	Term ends Oct 10, 2033	From the USPTO record
US 12,428,516	Process for producing a low density free-rise polyurethane foam In force Term ends Oct 10, 2033 · From the USPTO record	In force	Term ends Oct 10, 2033	From the USPTO record
US 12,460,040	Isocyanate-based polymer foam having improved flame retardant properties In force Term ends Nov 26, 2033 · From the USPTO record	In force	Term ends Nov 26, 2033	From the USPTO record
US 10,493,879	Ventilated seat element In force Term ends Feb 9, 2034 · From the USPTO record	In force	Term ends Feb 9, 2034	From the USPTO record
US 10,252,655	Padded Element, and Process and Mold for Producing Same In force Term ends May 21, 2034 · High confidence	In force	Term ends May 21, 2034	High confidence
US 10,427,571	Vehicular seat element In force Term ends Feb 26, 2036 · From the USPTO record	In force	Term ends Feb 26, 2036	From the USPTO record

10 of 21 patents shown.

Pro members see all 21.

Pro members: see all 21 patents

Also on record, not counted in the 21: 14 lapsed for an unpaid fee · 30 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.

2 pending · 4 abandoned · 6 no status recorded

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