Maintenance fees coming due

Advansix Inc.

16 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Feb 22, 2027. Unpaid by Aug 23, 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 11,731,937	Amino Acid Surfactants Advansix Resins & Chemicals LLC. In force Fee due Feb 22, 2027 Lapses if unpaid Aug 23, 2027 Term ends Mar 9, 2041 · Medium confidence	Advansix Resins & Chemicals LLC.	In force	Feb 22, 2027	Aug 23, 2027	Term ends Mar 9, 2041	Medium confidence
US 10,435,225	Heat Sealable Food Packing Films, Methods for the Production Thereof, and Food Packages Comprising Heat Sealable Food Packaging Films Advansix Inc. In force Fee due Apr 8, 2027 Lapses if unpaid Oct 8, 2027 Term ends Jan 11, 2033 · Medium confidence	Advansix Inc.	In force	Apr 8, 2027	Oct 8, 2027	Term ends Jan 11, 2033	Medium confidence
US 10,442,928	Polyamide 6 Resins Containing a Low Level of Polyamide 66 Comonomer Advansix Resins & Chemicals LLC In force Fee due Apr 15, 2027 Lapses if unpaid Oct 15, 2027 Term ends Jul 14, 2037 · High confidence	Advansix Resins & Chemicals LLC	In force	Apr 15, 2027	Oct 15, 2027	Term ends Jul 14, 2037	High confidence
US 11,787,967	Branched Amino Acid Surfactants for Inks, Paints, and Adhesives Advansix Resins & Chemicals LLC In force Fee due Apr 17, 2027 Lapses if unpaid Oct 18, 2027 Term ends Aug 11, 2040 · High confidence	Advansix Resins & Chemicals LLC	In force	Apr 17, 2027	Oct 18, 2027	Term ends Aug 11, 2040	High confidence
US 11,795,143	Amino Acid Surfactants Advansix Resins & Chemicals LLC. In force Fee due Apr 24, 2027 Lapses if unpaid Oct 25, 2027 Term ends Jun 12, 2041 · High confidence	Advansix Resins & Chemicals LLC.	In force	Apr 24, 2027	Oct 25, 2027	Term ends Jun 12, 2041	High confidence
US 10,494,740	Dual-Terminated Polyamide for High Speed Spinning Application Advansix Resins & Chemicals LLC In force Fee due Jun 3, 2027 Lapses if unpaid Dec 3, 2027 Term ends Jan 20, 2038 · High confidence	Advansix Resins & Chemicals LLC	In force	Jun 3, 2027	Dec 3, 2027	Term ends Jan 20, 2038	High confidence
US 9,221,762	Gas and Liquid Phase Catalytic Beckmann Rearrangement of Oximes to Produce Lactams Advansix Resins & Chemicals LLC In force Fee due Jun 29, 2027 Lapses if unpaid Dec 29, 2027 Term ends Oct 23, 2032 · High confidence	Advansix Resins & Chemicals LLC	In force	Jun 29, 2027	Dec 29, 2027	Term ends Oct 23, 2032	High confidence
US 11,857,515	Branched Amino Acid Surfactants for Use in Healthcare Products Advansix Resins & Chemicals LLC In force Fee due Jul 2, 2027 Lapses if unpaid Jan 3, 2028 Term ends Aug 11, 2040 · High confidence	Advansix Resins & Chemicals LLC	In force	Jul 2, 2027	Jan 3, 2028	Term ends Aug 11, 2040	High confidence
US 10,537,884	Hierarchical Aluminophosphates as Catalysts for the Beckmann Rearrangement AdvanSix Resins & Chemicals LLC In force Fee due Jul 21, 2027 Lapses if unpaid Jan 21, 2028 Term ends Nov 30, 2035 · Medium confidence	AdvanSix Resins & Chemicals LLC	In force	Jul 21, 2027	Jan 21, 2028	Term ends Nov 30, 2035	Medium confidence
US 11,891,568	Surfactants for Oil and Gas Production AdvanSix Resins & Chemicals LLC In force Fee due Aug 6, 2027 Lapses if unpaid Feb 7, 2028 Term ends Mar 5, 2041 · High confidence	AdvanSix Resins & Chemicals LLC	In force	Aug 6, 2027	Feb 7, 2028	Term ends Mar 5, 2041	High confidence
6 more maintenance fees coming due in the 12 months from Nov 15, 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.

Upgrade to Pro

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