Avanpore LLC

8 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

May 2042

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 Apr 17, 2027
The maintenance fee for Composite poly (aryl ether ketone) membranes, their preparation and use thereof (US 11,786,871) comes due Apr 17, 2027. Unpaid by Oct 18, 2027, it lapses early.
1 fee due Jul 23, 2027
The maintenance fee for Mesoporous poly (aryl ether ketone) hollow fiber membranes and use thereof in mass transfer processes (US 11,878,284) comes due Jul 23, 2027. Unpaid by Jan 24, 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.

Showing 1 to 8 of 8

Patent	Title	Status	Expires	Confidence
US 11,673,099	Composite Poly (Aryl Ether Ketone) Membranes, Their Preparation And Use Thereof In force Term ends May 5, 2042 · High confidence	In force	Term ends May 5, 2042	High confidence
US 11,786,871	Composite poly (aryl ether ketone) membranes, their preparation and use thereof In force Ends no later than May 5, 2042 · From the USPTO record	In force	Ends no later than May 5, 2042	From the USPTO record
US 11,505,671	Preparation of mesoporous poly (aryl ether ketone) articles and use thereof In force Term ends May 10, 2042 · From the USPTO record	In force	Term ends May 10, 2042	From the USPTO record
US 11,629,239	Preparation Of Mesoporous Poly (Aryl Ether Ketone) Articles And Use Thereof In force Term ends May 10, 2042 · Medium confidence	In force	Term ends May 10, 2042	Medium confidence
US 11,491,464	Mesoporous poly (aryl ether ketone) hollow fiber membranes and use thereof in mass transfer processes In force Term ends Jun 9, 2042 · From the USPTO record	In force	Term ends Jun 9, 2042	From the USPTO record
US 11,878,284	Mesoporous poly (aryl ether ketone) hollow fiber membranes and use thereof in mass transfer processes In force Term ends Jun 9, 2042 · From the USPTO record	In force	Term ends Jun 9, 2042	From the USPTO record
US 11,511,238	Composite covalent organic framework membranes In force Term ends Jul 12, 2042 · From the USPTO record	In force	Term ends Jul 12, 2042	From the USPTO record
US 12,502,640	Apparatus and method for purification of gas mixtures In force Term ends Jul 15, 2045 · From the USPTO record	In force	Term ends Jul 15, 2045	From the USPTO record

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.

1 no status recorded

List them