Interwell P&A As

9 patents currently held · Updated Nov 14, 2026

1 more in force is now held by another company

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

Ending by 2030

Oct 2033

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 Sep 12, 2027
The maintenance fee for Well Tool Device for Forming a Permanent Barrier in a Well (US 11,927,065) comes due Sep 12, 2027. Unpaid by Mar 13, 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 9 of 9

Patent	Title	Status	Expires	Confidence
US 9,683,420	Method of well operation In force Term ends Oct 12, 2033 · From the USPTO record	In force	Term ends Oct 12, 2033	From the USPTO record
US 12,024,973	Well Tool Device for Forming a Permanent Cap Rock to Cap Rock Barrier and Method for Using Same In force Term ends Aug 14, 2040 · High confidence	In force	Term ends Aug 14, 2040	High confidence
US 11,927,065	Well Tool Device for Forming a Permanent Barrier in a Well In force Term ends Dec 29, 2040 · High confidence	In force	Term ends Dec 29, 2040	High confidence
US 12,024,970	Well Tool Device and Method of Forming a Permanent Well Barrier, Configured to Generate a Forced Flow of Molten Mass In force Term ends Dec 31, 2040 · High confidence	In force	Term ends Dec 31, 2040	High confidence
US 12,203,337	Thermite Reaction Charge, Method for Forming a Threephased Rock-To-Rock Well Barrier, and a Well Barrier Formed Thereof In force Term ends Jul 1, 2041 · High confidence	In force	Term ends Jul 1, 2041	High confidence
US 12,129,736	Method for Providing a Permanent Barrier in a Well In force Term ends Mar 10, 2042 · High confidence	In force	Term ends Mar 10, 2042	High confidence
US 12,291,942	System and Method for Forming a Permanent Barrier in a Well In force Term ends Mar 10, 2042 · High confidence	In force	Term ends Mar 10, 2042	High confidence
US 12,560,048	Method for Providing a Permanent Barrier in a Well In force Term ends Mar 10, 2042 · Medium confidence	In force	Term ends Mar 10, 2042	Medium confidence
US 12,404,738	Downhole pressure equalizer In force Term ends May 5, 2042 · From the USPTO record	In force	Term ends May 5, 2042	From the USPTO record

Also on record, not counted in the 9: 1 patent in force now held by others. 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

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 no status recorded

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