Maintenance fees coming due

Ascend Performance Materials Operations LLC

16 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 13, 2026. Unpaid by Jun 14, 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 11,674,247	Polyamide Nanofiber Nonwovens Ascend Performance Materials Operations LLC In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends Jun 8, 2038 · High confidence	Ascend Performance Materials Operations LLC	In force	Dec 13, 2026	Jun 14, 2027	Term ends Jun 8, 2038	High confidence
US 11,680,038	Processes and Systems for Using Silica Particles in Fluid Bed Reactor Ascend Performance Materials Operations LLC In force Fee due Dec 20, 2026 Lapses if unpaid Jun 21, 2027 Term ends Jun 27, 2039 · High confidence	Ascend Performance Materials Operations LLC	In force	Dec 20, 2026	Jun 21, 2027	Term ends Jun 27, 2039	High confidence
US 11,708,523	Methods for Stabilizing Water Sensitive Clays and Migrating Fines in Subterranean Formations Ascend Performance Materials Operations LLC In force Fee due Jan 25, 2027 Lapses if unpaid Jul 26, 2027 Term ends Nov 1, 2037 · High confidence	Ascend Performance Materials Operations LLC	In force	Jan 25, 2027	Jul 26, 2027	Term ends Nov 1, 2037	High confidence
US 11,742,523	Electrolyte Solutions Ascend Performance Materials Operations LLC In force Fee due Feb 28, 2027 Lapses if unpaid Aug 30, 2027 Term ends Oct 17, 2041 · High confidence	Ascend Performance Materials Operations LLC	In force	Feb 28, 2027	Aug 30, 2027	Term ends Oct 17, 2041	High confidence
US 11,753,504	Copolyamide Compositions with Reduced Crystallization Rates Ascend Performance Materials Operations LLC In force Fee due Mar 12, 2027 Lapses if unpaid Sep 13, 2027 Term ends Sep 27, 2037 · High confidence	Ascend Performance Materials Operations LLC	In force	Mar 12, 2027	Sep 13, 2027	Term ends Sep 27, 2037	High confidence
US 11,758,909	Antimicrobial Nonwoven Polyamides with Zinc Content Ascend Performance Materials Operations LLC In force Fee due Mar 19, 2027 Lapses if unpaid Sep 20, 2027 Term ends Oct 23, 2041 · High confidence	Ascend Performance Materials Operations LLC	In force	Mar 19, 2027	Sep 20, 2027	Term ends Oct 23, 2041	High confidence
US 11,772,081	Processes for Stabilizing Antimony Catalysts Ascend Performance Materials Operations LLC In force Fee due Apr 3, 2027 Lapses if unpaid Oct 4, 2027 Term ends Feb 21, 2040 · High confidence	Ascend Performance Materials Operations LLC	In force	Apr 3, 2027	Oct 4, 2027	Term ends Feb 21, 2040	High confidence
US 11,779,905	Catalyst Compositions and Process for Direct Production of Hydrogen Cyanide in an Acrylonitrile Reactor Feed Stream Ascend Performance Materials Operations LLC In force Fee due Apr 10, 2027 Lapses if unpaid Oct 12, 2027 Term ends Oct 18, 2037 · High confidence	Ascend Performance Materials Operations LLC	In force	Apr 10, 2027	Oct 12, 2027	Term ends Oct 18, 2037	High confidence
US 11,780,804	Tricyanohexane Purification Methods Ascend Performance Materials Operations LLC In force Fee due Apr 10, 2027 Lapses if unpaid Oct 12, 2027 Term ends Mar 12, 2041 · High confidence	Ascend Performance Materials Operations LLC	In force	Apr 10, 2027	Oct 12, 2027	Term ends Mar 12, 2041	High confidence
US 11,787,940	Nylon Terpolymers Ascend Performance Materials Operations LLC In force Fee due Apr 17, 2027 Lapses if unpaid Oct 18, 2027 Term ends Jul 29, 2039 · High confidence	Ascend Performance Materials Operations LLC	In force	Apr 17, 2027	Oct 18, 2027	Term ends Jul 29, 2039	High confidence
6 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 16 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.