Polystyvert Inc.

10 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

Oct 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 Dec 20, 2026
The maintenance fee for Processes for Recycling Polystyrene Waste (US 11,680,149) comes due Dec 20, 2026. Unpaid by Jun 21, 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 10 of 10

Patent	Title	Status	Expires	Confidence
US 11,407,878	Processes for Recycling Polystyrene Waste In force Term ends Oct 5, 2035 · High confidence	In force	Term ends Oct 5, 2035	High confidence
US 12,275,824	Processes for Recycling Polystyrene Waste In force Term ends Oct 5, 2035 · High confidence	In force	Term ends Oct 5, 2035	High confidence
US 10,961,367	Processes for Recycling Polystyrene Waste In force Term ends Nov 20, 2038 · High confidence	In force	Term ends Nov 20, 2038	High confidence
US 12,173,122	Processes for recycling polystyrene waste In force Term ends Nov 20, 2038 · From the USPTO record	In force	Term ends Nov 20, 2038	From the USPTO record
US 11,680,149	Processes for Recycling Polystyrene Waste In force Term ends Jan 22, 2039 · High confidence	In force	Term ends Jan 22, 2039	High confidence
US 11,407,877	Processes for recycling polystyrene waste and/or polystyrene copolymer waste In force Term ends Oct 25, 2039 · From the USPTO record	In force	Term ends Oct 25, 2039	From the USPTO record
US 12,649,839	Processes for Recycling Polystyrene Waste And/Or Polystyrene Copolymer Waste In force Term ends Oct 25, 2039 · Medium confidence	In force	Term ends Oct 25, 2039	Medium confidence
US 12,018,132	Processes for recycling polystyrene waste and/or polystyrene copolymer waste In force Term ends Dec 29, 2039 · From the USPTO record	In force	Term ends Dec 29, 2039	From the USPTO record
US 12,281,207	Methods of Recycling Polystyrene Material Comprising Brominated Contaminants In force Term ends Nov 11, 2042 · High confidence	In force	Term ends Nov 11, 2042	High confidence
US 12,398,254	Methods of Recycling Polystyrene Material Comprising Brominated Contaminants In force Term ends Nov 11, 2042 · High confidence	In force	Term ends Nov 11, 2042	High confidence

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 · 2 abandoned

List them