Maintenance fees coming due

Solvay S.A.

11 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Nov 28, 2026. Unpaid by May 28, 2027, that one lapses early.

A maintenance fee does not end a patent on its due date. It falls due at 3.5, 7.5 and 11.5 years from grant, and the patent lapses only if the fee is still unpaid at the end of the six month grace period that follows.

Patent	Title	Holder	Status	Fee due	Lapses if unpaid	Expires	Confidence
US 10,300,434	Reactive Composition Based on Sodium Bicarbonate and Process for Its Production Solvay S.A. In force Fee due Nov 28, 2026 Lapses if unpaid May 28, 2027 Term ends Feb 10, 2035 · High confidence	Solvay S.A.	In force	Nov 28, 2026	May 28, 2027	Term ends Feb 10, 2035	High confidence
US 10,308,517	Method for preparing alkali metal bicarbonate particles Solvay S.A. In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Jun 26, 2034 · High confidence	Solvay S.A.	In force	Dec 4, 2026	Jun 4, 2027	Term ends Jun 26, 2034	High confidence
US 9,051,627	Process for producing sodium bicarbonate Solvay S.A. In force Fee due Dec 9, 2026 Lapses if unpaid Jun 9, 2027 Term ends Feb 1, 2033 · High confidence	Solvay S.A.	In force	Dec 9, 2026	Jun 9, 2027	Term ends Feb 1, 2033	High confidence
US 9,056,773	Process for the Manufacture of Hydrogen Peroxide Solvay S.A. In force Fee due Dec 16, 2026 Lapses if unpaid Jun 16, 2027 Term ends Nov 7, 2032 · High confidence	Solvay S.A.	In force	Dec 16, 2026	Jun 16, 2027	Term ends Nov 7, 2032	High confidence
US 10,392,257	Method for Enhancing Sodium Bicarbonate Flowability Solvay S.A. In force Fee due Feb 27, 2027 Lapses if unpaid Aug 27, 2027 Term ends Jan 18, 2038 · High confidence	Solvay S.A.	In force	Feb 27, 2027	Aug 27, 2027	Term ends Jan 18, 2038	High confidence
US 10,486,980	Process for Manufacture of Purified Alkaline Earth Metal Carbonate Solvay S.A. In force Fee due May 26, 2027 Lapses if unpaid Nov 26, 2027 Term ends Aug 24, 2035 · High confidence	Solvay S.A.	In force	May 26, 2027	Nov 26, 2027	Term ends Aug 24, 2035	High confidence
US 10,508,528	Multi-well solution mining exploitation of an evaporite mineral stratum Solvay S.A. In force Fee due Jun 17, 2027 Lapses if unpaid Dec 17, 2027 Term ends Mar 13, 2035 · High confidence	Solvay S.A.	In force	Jun 17, 2027	Dec 17, 2027	Term ends Mar 13, 2035	High confidence
US 9,221,010	Two-Step Process for the Cleaning of a Flue Gas Solvay S.A. In force Fee due Jun 29, 2027 Lapses if unpaid Dec 29, 2027 Term ends Oct 15, 2034 · High confidence	Solvay S.A.	In force	Jun 29, 2027	Dec 29, 2027	Term ends Oct 15, 2034	High confidence
US 10,562,122	Process for Brazing of Aluminum Alloys and a Flux Solvay S.A. In force Fee due Aug 18, 2027 Lapses if unpaid Feb 18, 2028 Term ends Mar 11, 2036 · High confidence	Solvay S.A.	In force	Aug 18, 2027	Feb 18, 2028	Term ends Mar 11, 2036	High confidence
US 11,926,722	Functionalized Particulate Bicarbonate as Blowing Agent, Foamable Polymer Composition Containing It, and Its Use in Manufacturing a Thermoplastic Foamed Polymer Solvay S.A. In force Fee due Sep 12, 2027 Lapses if unpaid Mar 13, 2028 Term ends Sep 1, 2038 · High confidence	Solvay S.A.	In force	Sep 12, 2027	Mar 13, 2028	Term ends Sep 1, 2038	High confidence
1 more maintenance fee coming due in the 12 months from Nov 14, 2026 · Pro

10 of 11 patents shown. Soonest fee due date first, then patent number.

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