Maintenance fees coming due

Casale S.A.

31 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 2, 2026. Unpaid by Jun 2, 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 9,045,439	Process for the Production of High Purity Melamine from Urea Casale S.A. In force Fee due Dec 2, 2026 Lapses if unpaid Jun 2, 2027 Term ends Feb 24, 2029 · High confidence	Casale S.A.	In force	Dec 2, 2026	Jun 2, 2027	Term ends Feb 24, 2029	High confidence
US 11,666,883	Plant for the Synthesis of Melamine with Offgas Recovery in a Tied-In Urea Plant Casale S.A. In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 Term ends Jan 14, 2039 · High confidence	Casale S.A.	In force	Dec 6, 2026	Jun 7, 2027	Term ends Jan 14, 2039	High confidence
US 11,684,902	Reactor with a Catalytic Bed Casale S.A. In force Fee due Dec 27, 2026 Lapses if unpaid Jun 28, 2027 Term ends May 23, 2038 · High confidence	Casale S.A.	In force	Dec 27, 2026	Jun 28, 2027	Term ends May 23, 2038	High confidence
US 10,336,623	Method for Revamping an Ammonia Converter Casale S.A. In force Fee due Jan 2, 2027 Lapses if unpaid Jul 2, 2027 Term ends May 17, 2036 · High confidence	Casale S.A.	In force	Jan 2, 2027	Jul 2, 2027	Term ends May 17, 2036	High confidence
US 9,073,877	Process for the Production of High Purity Melamine from Urea Casale S.A. In force Fee due Jan 7, 2027 Lapses if unpaid Jul 7, 2027 Term ends Feb 24, 2029 · High confidence	Casale S.A.	In force	Jan 7, 2027	Jul 7, 2027	Term ends Feb 24, 2029	High confidence
US 10,386,120	Shell and Tube Heat Exchanger Casale S.A. In force Fee due Feb 20, 2027 Lapses if unpaid Aug 20, 2027 Term ends Jun 19, 2035 · High confidence	Casale S.A.	In force	Feb 20, 2027	Aug 20, 2027	Term ends Jun 19, 2035	High confidence
US 9,120,068	Isothermal Chemical Reactor With Plate Heat Exchanger Casale S.A. In force Fee due Mar 1, 2027 Lapses if unpaid Sep 1, 2027 Term ends Feb 13, 2029 · High confidence	Casale S.A.	In force	Mar 1, 2027	Sep 1, 2027	Term ends Feb 13, 2029	High confidence
US 11,746,076	Process for Methanol Production Casale S.A. In force Fee due Mar 5, 2027 Lapses if unpaid Sep 7, 2027 Term ends Jan 31, 2038 · High confidence	Casale S.A.	In force	Mar 5, 2027	Sep 7, 2027	Term ends Jan 31, 2038	High confidence
US 10,406,495	Wall for Catalytic Beds of Reactors and Method for Realizing the Same Casale S.A. In force Fee due Mar 10, 2027 Lapses if unpaid Sep 10, 2027 Term ends Apr 20, 2037 · High confidence	Casale S.A.	In force	Mar 10, 2027	Sep 10, 2027	Term ends Apr 20, 2037	High confidence
US 11,752,467	Method for Removing Nitrogen Oxides from a Gas Casale S.A. In force Fee due Mar 12, 2027 Lapses if unpaid Sep 13, 2027 Term ends Sep 26, 2037 · High confidence	Casale S.A.	In force	Mar 12, 2027	Sep 13, 2027	Term ends Sep 26, 2037	High confidence
21 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 31 patents shown. Soonest fee due date first, then patent number.

Pro members see every patent with a maintenance fee coming due: number, title, status, the due date, and the date it lapses if the fee goes unpaid through the grace period.

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Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.