85 patents currently held
371 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.
7 more records may belong here and await a decision; they are not counted.
The next term ends in Mar 2027. from the record
Of the 371 now held by other companies, 241 name Specialty Operations France as their current owner, and 130 more name another party. Each row says which.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
19
Ending by 2030
Mar 2027
Next term end
78
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Jan 2036 · High confidence
Also notable
Ends no later than Mar 2027 · Medium confidence
Also notable
Ends Apr 2035 · High confidence
Solvent Systems for Dicyandiamide And/Or Alkyl Thiophosphoric Triamide and Use in Agricultural Applications
US 10,196,322
Cited by 21 later US patents, top 25% of utility patents granted in 2019 in our data. Protection runs to 2036.
Catalytic Compositions Comprising the Oxides of Zirconium, Cerium, Yttrium, Lanthanum and Other Rare Earths
US 7,964,527
The most cited patent in this portfolio, cited by 29 later US patents, top 25% of utility patents granted in 2011 in our data. Protection runs to 2027. A terminal disclaimer is on file and its reference is not resolved, so no cap is applied and the date may move earlier, never later.
Novel Method for Preparing Precipitated Silicas, Novel Precipitated Silicas and the Uses of Same, in Particular for Reinforcing Polymers
US 10,259,715
The largest patent family in this portfolio, 67 related applications, renewed at 2 of 3 maintenance windows. Protection runs to 2035.
Formerly held, still cited
Notable
Ends Sep 2032 · High confidence
The most cited patent in this portfolio, cited by 84 later US patents, top 5% of utility patents granted in 2015 in our data. Protection runs to 2032.
now held by Energy Solutions US LLC
Also notable
Ends Dec 2034 · High confidence
Cited by 27 later US patents, top 10% of utility patents granted in 2018 in our data. Protection runs to 2034.
now held by Specialty Operations France
Also notable
Ends Dec 2033 · High confidence
Cited by 15 later US patents, top 25% of utility patents granted in 2016 in our data, and renewed at every maintenance window due so far. Protection runs to 2033.
now held by Specialty Operations France
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 Dec 2, 2026The maintenance fee for Synergistic Detergent and Active Metal Compound Combination (US 9,045,709) comes due Dec 2, 2026. Unpaid by Jun 2, 2027, it lapses early.
- 3 fees due Jan 9 to 18, 2027 · next Jan 9
- 3 fees due Feb 6 to 25, 2027 · next Feb 6
- 1 fee due Apr 22, 2027The maintenance fee for Synergistic Detergent and Active Metal Compound Combination (US 10,450,524) comes due Apr 22, 2027. Unpaid by Oct 22, 2027, it lapses early.
- 1 fee due Jun 22, 2027The maintenance fee for Alumina-Based Nitrogen Oxide (NOx) Trapping Compositions and Treatment of Vehicular Exhaust Gases Therewith (US 9,216,381) comes due Jun 22, 2027. Unpaid by Dec 22, 2027, it lapses early.
- 1 fee due Jul 30, 2027The maintenance fee for Precipitated Silica and Process for Its Manufacture (US 11,884,551) comes due Jul 30, 2027. Unpaid by Jan 31, 2028, it lapses early.
- 2 fees due Aug 13 to 23, 2027 · next Aug 13
- 3 fees due Sep 3 to 10, 2027 · next Sep 3
- 3 fees due Oct 7 to 23, 2027 · next Oct 7
Recent changes
- 8 of the patents on this record were granted since Aug 17, 2026
- 6 terms have ended since Aug 17, 2026
What they patent
The 5 largest of its 78 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,964,527 | Catalytic Compositions Comprising the Oxides of Zirconium, Cerium, Yttrium, Lanthanum and Other Rare Earths In force · Medium confidence | In force | Medium confidence | |
| US 7,767,617 | Reduced Maximum Reducibility Temperature Zirconium Oxide and Cerium Oxide Based Composition, Method for the Production and Use Thereof as a Catalyst In force · High confidence | In force | High confidence | |
| US 7,939,462 | Composition Based on Cerium and Zirconium Oxides Having a Specific Surface Which Is Stable Between 900¿C and 1000¿C Method for the Production and Use Thereof as a Catalyst In force · High confidence | In force | High confidence | |
| US 10,882,025 | Catalyst/Catalyst Support Compositions Having High Reducibility and Comprising a Nanometric Cerium Oxide Deposited onto a Support Substrate In force · Medium confidence | In force | Medium confidence | |
| US 8,158,551 | Catalyst Compositions for the Treatment of Vehicular Exhaust Gases Comprise Zirconium Oxide and Cerium Oxide, and Have a High Reducibility and a Stable Specific Surface Area In force · High confidence | In force | High confidence | |
| US 8,222,450 | Preparation of Sulfonic Acid Anhydrides In force · High confidence | In force | High confidence | |
| US 7,875,672 | Two Component Waterborne Polyurethane Coatings for Anti-Graffiti Application In force · High confidence | In force | High confidence | |
| US 8,317,888 | Liquid Suspensions and Powders of Cerium Oxide Particles and Polishing Applications Thereof In force · Medium confidence | In force | Medium confidence | |
| US 10,450,524 | Synergistic Detergent and Active Metal Compound Combination held by Rhodia Operations and The Lubrizol Corporation In force · Medium confidence | In force | Medium confidence | |
| US 8,389,436 | Composite Oxide In force · High confidence | In force | High confidence |
Also on record, not counted in the 85: 371 patents in force now held by others · 354 patents ended · 71 applications pending · 381 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.