Hercules Incorporated

61 patents currently held · Updated Nov 14, 2026

54 more in force are now held by other companies

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

Recorded under 17 name spellings.

Ending by 2030

Jan 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 Nov 28, 2026
The maintenance fee for Device for Sensorial Evaluation of Consumer Product Application Feel (US 10,303,842) comes due Nov 28, 2026. Unpaid by May 28, 2027, it lapses early.
1 fee due Jan 23, 2027
The maintenance fee for Coating Compositions Containing Lactam-Functionalized Polymer (US 10,358,574) comes due Jan 23, 2027. Unpaid by Jul 23, 2027, it lapses early.
2 fees due Feb 6, 2027
1 fee due Mar 12, 2027
The maintenance fee for Cellulose ether-lactam hybrid polymers, compositions, and methods for preparing and using the hybrid polymers (US 11,753,484) comes due Mar 12, 2027. Unpaid by Sep 13, 2027, it lapses early.
1 fee due Apr 17, 2027
The maintenance fee for Coarse Particle Solid Nonionic Synthetic Associative Thickeners for Paint Formulations and Methods for Producing the Same (US 11,787,972) comes due Apr 17, 2027. Unpaid by Oct 18, 2027, it lapses early.
2 fees due Aug 2 to 25, 2027 · next Aug 2
1 fee due Sep 24, 2027
The maintenance fee for Coprocessed Silica Coated Polymer Composition (US 10,596,261) comes due Sep 24, 2027. Unpaid by Mar 24, 2028, it lapses early.
2 fees due Oct 26, 2027

Which patents, and when each one lapses · Pro

Recent changes

4 terms have 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 7,562,419	Process for Purification of Cotton Linters In force Term ends Jan 20, 2027 · High confidence	In force	Term ends Jan 20, 2027	High confidence
US 7,531,591	Aqueous Dispersion of Poly(ACETAL-POLYETHER) and Its Use in Protective Coatings In force Term ends Aug 8, 2027 · High confidence	In force	Term ends Aug 8, 2027	High confidence
US 7,622,427	Ethoxylated Raw Cotton Linters for Completion and Workover Fluids In force Term ends Aug 9, 2027 · High confidence	In force	Term ends Aug 9, 2027	High confidence
US 7,851,416	Oxidized Guar for Oilfield Servicing Fluids In force Term ends Mar 4, 2029 · High confidence	In force	Term ends Mar 4, 2029	High confidence
US 8,450,386	Use of polyethylene glycol based fluidized polymer suspension in functional systems In force Term ends Jul 13, 2029 · High confidence	In force	Term ends Jul 13, 2029	High confidence
US 8,076,279	Cleansing Formulations Comprising Non-Cellulosic Polysaccharide with Mixed Cationic Substituents In force Term ends Oct 9, 2029 · High confidence	In force	Term ends Oct 9, 2029	High confidence
US 8,258,085	Oil-Well Cement Fluid Loss Additive Compostion In force Term ends Nov 9, 2029 · High confidence	In force	Term ends Nov 9, 2029	High confidence
US 8,709,390	Blocky hydroxyethylcellulose, derivatives thereof, process of making, and uses thereof In force Term ends Jan 12, 2030 · High confidence	In force	Term ends Jan 12, 2030	High confidence
US 7,973,004	Rheology Modifier for Aqueous Surfactant-Based Formulations In force Term ends Feb 12, 2030 · High confidence	In force	Term ends Feb 12, 2030	High confidence
US 8,633,278	Bimolecular Inverse Emulsion Polymer In force Term ends Apr 9, 2030 · High confidence	In force	Term ends Apr 9, 2030	High confidence

10 of 61 patents shown.

Pro members see all 61.

Pro members: see all 61 patents

Also on record, not counted in the 61: 54 patents in force now held by others · 104 lapsed for an unpaid fee · 1,293 ended at full term · 1 past the fee grace period · 1 with no computed 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.

3 pending · 46 abandoned · 8 no status recorded

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