54 patents currently held

69 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.

1 more record may belong here and awaits a decision; it is not counted.

The next term ends in Jun 2029. from the record

Of the 69 now held by other companies, 63 name Syensqo S.A. as their current owner, and 6 more name another party. Each row says which.

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Jun 2029

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

2026202720282029 203020312032 2033 2034 2035 2036 2037 2038 203920402041 2042 204320442045

notable patents fee due within 90 days all others Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 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

Process for Producing a Concentrated Aqueous Sodium Hydroxide Solution US 11,465,907

Granted 2022. Computed term ends 2034. A terminal disclaimer caps this term to an earlier patent's.

Ends Nov 2034 · High confidence Also notable

Functionalized Particulate Bicarbonate as Blowing Agent, Foamable Polymer Compositon Containing It, and Its Use in Manufacturing a Thermoplastic Foamed Polymer US 11,421,094

The newest of the three, granted 2022. It anchors the portfolio to 2038, later than anything else here.

Ends Jan 2038 · High confidence Also notable

A Method for Dielectrically Insulating Active Electric Parts US 10,283,234

The largest patent family in this portfolio, 36 related applications, renewed at 2 of 3 maintenance windows. Protection runs to 2035.

Ends Apr 2035 · High confidence

Formerly held, still cited

Notable

Fluoropolymer Film US 10,227,462

The largest patent family in this portfolio, 36 related applications, renewed at 2 of 3 maintenance windows. Protection runs to 2034.

now held by Syensqo S.A.

Ends Jan 2034 · High confidence

Also notable

Electrolyte Composition Comprising Fluorinated Carbonate, and Battery Comprising the Same US 10,176,935

A family of 17 related applications built on the 2019 grant. Protection runs to 2035.

now held by Syensqo S.A.

Ends Dec 2035 · High confidence

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 Reactive Composition Based on Sodium Bicarbonate and Process for Its Production (US 10,300,434) comes due Nov 28, 2026. Unpaid by May 28, 2027, it lapses early.
3 fees due Dec 4 to 16, 2026 · next Dec 4
1 fee due Feb 27, 2027
The maintenance fee for Method for Enhancing Sodium Bicarbonate Flowability (US 10,392,257) comes due Feb 27, 2027. Unpaid by Aug 27, 2027, it lapses early.
1 fee due May 26, 2027
The maintenance fee for Process for Manufacture of Purified Alkaline Earth Metal Carbonate (US 10,486,980) comes due May 26, 2027. Unpaid by Nov 26, 2027, it lapses early.
2 fees due Jun 17 to 29, 2027 · next Jun 17
1 fee due Aug 18, 2027
The maintenance fee for Process for Brazing of Aluminum Alloys and a Flux (US 10,562,122) comes due Aug 18, 2027. Unpaid by Feb 18, 2028, it lapses early.
1 fee due Sep 12, 2027
The maintenance fee for Functionalized Particulate Bicarbonate as Blowing Agent, Foamable Polymer Composition Containing It, and Its Use in Manufacturing a Thermoplastic Foamed Polymer (US 11,926,722) comes due Sep 12, 2027. Unpaid by Mar 13, 2028, it lapses early.
1 fee due Nov 12, 2027
The maintenance fee for Process for Manufacturing a Purified Aqueous Hydrogen Peroxide Solution (US 10,647,576) comes due Nov 12, 2027. Unpaid by May 12, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

2 of the patents on this record were granted since Aug 16, 2026
2 terms have ended since Aug 16, 2026

What they patent

The 5 largest of its 46 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Two-Step Process for the Cleaning of a Flue Gas	4 in force	to Oct 2034
Process for Treating a Sodium Carbonate Purge	3 in force	to Jan 2035
Process for Producing a Calcium Phosphate Reactant, Reactant Obtained and Use Thereof in the Purification of Liquid Effluents	2 in force	to Oct 2035
Multi-Well Solution Mining Exploitation of an Evaporite Mineral Stratum	2 in force	to Mar 2035
Process for the Preparation of Halogenated Carboxylic Anhydrides	2 in force	to Aug 2034

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 10,807,876	Process for the Joint Production of Sodium Carbonate and Sodium Bicarbonate In force Term ends Jun 19, 2029 · Medium confidence	In force	Term ends Jun 19, 2029	Medium confidence
US 9,427,750	Device and process for distributing a fluid In force Term ends Jun 15, 2030 · Medium confidence	In force	Term ends Jun 15, 2030	Medium confidence
US 10,793,433	Process for producing hydrogen peroxide In force Term ends Oct 2, 2032 · High confidence	In force	Term ends Oct 2, 2032	High confidence
US 9,056,773	Process for the Manufacture of Hydrogen Peroxide In force Term ends Nov 7, 2032 · High confidence	In force	Term ends Nov 7, 2032	High confidence
US 9,918,476	Method for manufacturing a parasiticidal composition In force Term ends Dec 19, 2032 · High confidence	In force	Term ends Dec 19, 2032	High confidence
US 8,865,095	Process for producing sodium bicarbonate In force Term ends Feb 1, 2033 · High confidence	In force	Term ends Feb 1, 2033	High confidence
US 9,051,627	Process for producing sodium bicarbonate In force Term ends Feb 1, 2033 · High confidence	In force	Term ends Feb 1, 2033	High confidence
US 9,868,644	Process for the Joint Production of Sodium Carbonate and Sodium Bicarbonate In force Ends no later than Oct 29, 2033 · Medium confidence	In force	Ends no later than Oct 29, 2033	Medium confidence
US 10,208,363	Process for producing sodium carbonate from an ore mineral comprising sodium bicarbonate In force Term ends Dec 5, 2033 · High confidence	In force	Term ends Dec 5, 2033	High confidence
US 9,528,361	Process for recovering soda values from underground soda deposits In force Term ends Dec 12, 2033 · High confidence	In force	Term ends Dec 12, 2033	High confidence

10 of 54 patents shown.

Pro members see all 54.

Pro members: see all 54 patents

Also on record, not counted in the 54: 69 patents in force now held by others · 62 patents ended · 41 applications pending · 146 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.

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