Maintenance fees coming due

Pfizer Inc.

122 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Nov 21, 2026. Unpaid by May 21, 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 10,294,225	N1-PYRAZOLOSPIROKETONE ACETYL-CoA CARBOXYLASE INHIBITORS Pfizer Inc. In force Fee due Nov 21, 2026 Lapses if unpaid May 21, 2027 Term ends Sep 1, 2029 · Medium confidence	Pfizer Inc.	In force	Nov 21, 2026	May 21, 2027	Term ends Sep 1, 2029	Medium confidence
US 10,294,289	Soluble Fibroblast Growth Factor Receptor 3 (SFGFR3) Polypeptides and Uses Thereof Pfizer Inc. In force Fee due Nov 21, 2026 Lapses if unpaid May 21, 2027 Term ends Jul 7, 2037 · High confidence	Pfizer Inc.	In force	Nov 21, 2026	May 21, 2027	Term ends Jul 7, 2037	High confidence
US 9,045,487	Salts and Polymorphs of 8-Fluoro-2-{4-[(methylamino)methyl]phenyl}-1,3,4,5-tetrahydro-6H-azepino[5,4,3-cd]indol-6-one Pfizer Inc. In force Fee due Dec 2, 2026 Lapses if unpaid Jun 2, 2027 Term ends Feb 10, 2031 · High confidence	Pfizer Inc.	In force	Dec 2, 2026	Jun 2, 2027	Term ends Feb 10, 2031	High confidence
US 10,316,018	Bicyclic-Fused Heteroaryl or Aryl Compounds as IRAK4 Modulators Pfizer Inc. In force Fee due Dec 11, 2026 Lapses if unpaid Jun 11, 2027 Term ends Aug 16, 2036 · High confidence	Pfizer Inc.	In force	Dec 11, 2026	Jun 11, 2027	Term ends Aug 16, 2036	High confidence
US 10,316,045	SUBSTITUTED PYRROLO[3,4-c]PYRAZOLES AS PKC KINASE INHIBITORS Pfizer Inc. In force Fee due Dec 11, 2026 Lapses if unpaid Jun 11, 2027 Term ends Feb 4, 2028 · Medium confidence	Pfizer Inc.	In force	Dec 11, 2026	Jun 11, 2027	Term ends Feb 4, 2028	Medium confidence
US 11,673,890	N1-PYRAZOLOSPIROKETONE ACETYL-CoA CARBOXYLASE INHIBITORS Pfizer Inc. In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends Sep 1, 2029 · Medium confidence	Pfizer Inc.	In force	Dec 13, 2026	Jun 14, 2027	Term ends Sep 1, 2029	Medium confidence
US 11,673,953	DLL3 Targeting Chimeric Antigen Receptors and Binding Agents Allogene Therapeutics, Inc. In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends Mar 7, 2041 · High confidence	Allogene Therapeutics, Inc.	In force	Dec 13, 2026	Jun 14, 2027	Term ends Mar 7, 2041	High confidence
US 11,674,240	Universal Antibody Libraries Pfizer Inc. In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends Dec 14, 2037 · High confidence	Pfizer Inc.	In force	Dec 13, 2026	Jun 14, 2027	Term ends Dec 14, 2037	High confidence
US 10,323,042	6,7-Dihydro-5H-pyrazolo[5,1-b][1,3]oxazine-2-carboxamide Compounds Pfizer Inc. In force Fee due Dec 18, 2026 Lapses if unpaid Jun 21, 2027 Term ends Feb 15, 2037 · High confidence	Pfizer Inc.	In force	Dec 18, 2026	Jun 21, 2027	Term ends Feb 15, 2037	High confidence
US 10,323,085	Methods of Treating Fibromyalgia Pfizer Limited In force Fee due Dec 18, 2026 Lapses if unpaid Jun 21, 2027 Term ends Mar 3, 2029 · High confidence	Pfizer Limited	In force	Dec 18, 2026	Jun 21, 2027	Term ends Mar 3, 2029	High confidence
112 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 122 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.