Cleansorb Limited

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

Mar 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 Aug 18, 2027
The maintenance fee for Method for treatment of underground reservoirs (US 10,563,112) comes due Aug 18, 2027. Unpaid by Feb 18, 2028, it lapses early.
1 fee due Sep 30, 2027
The maintenance fee for Process for acidizing (US 10,604,696) comes due Sep 30, 2027. Unpaid by Mar 31, 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 10 of 10

Patent	Title	Status	Expires	Confidence
US 8,101,675	Comminutable polyesters In force Term ends Mar 12, 2027 · From the USPTO record	In force	Term ends Mar 12, 2027	From the USPTO record
US 8,124,571	Process for treating an underground formation In force Term ends May 23, 2027 · From the USPTO record	In force	Term ends May 23, 2027	From the USPTO record
US 7,935,660	Process for disruption of filter cakes In force Term ends Dec 24, 2027 · From the USPTO record	In force	Term ends Dec 24, 2027	From the USPTO record
US 7,926,567	Method for controlled gelation of silicates In force Term ends Feb 1, 2028 · From the USPTO record	In force	Term ends Feb 1, 2028	From the USPTO record
US 8,043,996	Method for treatment of underground reservoirs In force Term ends Jul 3, 2028 · From the USPTO record	In force	Term ends Jul 3, 2028	From the USPTO record
US 9,982,183	Process for treating an underground formation In force Term ends Jan 14, 2033 · From the USPTO record	In force	Term ends Jan 14, 2033	From the USPTO record
US 10,563,112	Method for treatment of underground reservoirs In force Term ends Mar 2, 2035 · From the USPTO record	In force	Term ends Mar 2, 2035	From the USPTO record
US 10,604,696	Process for acidizing In force Term ends Oct 2, 2035 · From the USPTO record	In force	Term ends Oct 2, 2035	From the USPTO record
US 11,618,849	Shale Treatment In force Term ends May 9, 2037 · Medium confidence	In force	Term ends May 9, 2037	Medium confidence
US 11,999,898	Composition and method of reducing deposition of formate in underground formations In force Term ends Oct 28, 2041 · From the USPTO record	In force	Term ends Oct 28, 2041	From the USPTO record

Also on record, not counted in the 10: 6 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 no status recorded

List them