SNF Group

48 patents currently held · Updated Nov 14, 2026

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

Previously recorded as S.P.C.M. S.A. (to 2023)

Ending by 2030

Oct 2032

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 Jan 18, 2027
The maintenance fee for Aqueous dispersion of hydrosoluble or hydroswellable polymer (US 11,702,513) comes due Jan 18, 2027. Unpaid by Jul 19, 2027, it lapses early.
2 fees due Feb 8 to 15, 2027 · next Feb 8
3 fees due Mar 5 to 26, 2027 · next Mar 5
5 fees due Apr 3 to 30, 2027 · next Apr 3
2 fees due Sep 19 to 26, 2027 · next Sep 19

Which patents, and when each one lapses · Pro

Recent changes

4 of the patents on this record were granted since Aug 16, 2026
1 term has ended since Aug 16, 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 9,938,449	Method for the assisted recovery of petroleum In force Term ends Oct 23, 2032 · From the USPTO record	In force	Term ends Oct 23, 2032	From the USPTO record
US 10,457,860	Self suspending proppants with brine tolerance for hydraulic fracturing In force Term ends Dec 9, 2036 · From the USPTO record	In force	Term ends Dec 9, 2036	From the USPTO record
US 11,523,609	Seed treatment using hydroswellable polymer In force Term ends Apr 24, 2037 · From the USPTO record	In force	Term ends Apr 24, 2037	From the USPTO record
US 10,836,871	Method of Preparation of Cationic Polymers with Reduced Halides Content In force Term ends Nov 13, 2037 · High confidence	In force	Term ends Nov 13, 2037	High confidence
US 11,401,182	Process for Treatment of Aqueous Effluent In force Term ends Sep 15, 2038 · High confidence	In force	Term ends Sep 15, 2038	High confidence
US 11,718,783	Method for Preparing a Composition Comprising a Hydrosoluble (CO)POLYMER Encapsulated in a Shell and Use of This Composition in Assisted Oil and Gas Recovery In force Term ends Jan 31, 2039 · High confidence	In force	Term ends Jan 31, 2039	High confidence
US 11,725,144	Method for stabilizing sandy soils In force Term ends Sep 20, 2039 · From the USPTO record	In force	Term ends Sep 20, 2039	From the USPTO record
US 11,773,199	Auto-invertible inverse polymer emulsion In force Term ends Nov 4, 2039 · From the USPTO record	In force	Term ends Nov 4, 2039	From the USPTO record
US 11,987,744	Method for Modifying the Water Permeability of a Subterranean Formation In force Term ends Jan 29, 2040 · High confidence	In force	Term ends Jan 29, 2040	High confidence
US 11,767,460	Method for Modifying the Water Permeability of a Subterranean Formation In force Term ends Feb 12, 2040 · High confidence	In force	Term ends Feb 12, 2040	High confidence

10 of 48 patents shown.

Pro members see all 48.

Pro members: see all 48 patents

Also on record, not counted in the 48: 1 lapsed for an unpaid fee · 5 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.

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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.

11 pending · 2 abandoned · 10 no status recorded

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