Maintenance fees coming due

Purdue Pharma L.P.

45 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Dec 16, 2026. Unpaid by Jun 16, 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 9,056,832	Pyridine Compounds and the Uses Thereof Purdue Pharma L.P. In force Fee due Dec 16, 2026 Lapses if unpaid Jun 16, 2027 Term ends Sep 16, 2031 · High confidence	Purdue Pharma L.P.	In force	Dec 16, 2026	Jun 16, 2027	Term ends Sep 16, 2031	High confidence
US 9,056,836	Benzomorphan Analogs and the Use Thereof Purdue Pharma L.P. In force Fee due Dec 16, 2026 Lapses if unpaid Jun 16, 2027 Term ends Jan 30, 2034 · High confidence	Purdue Pharma L.P.	In force	Dec 16, 2026	Jun 16, 2027	Term ends Jan 30, 2034	High confidence
US 9,085,561	Cyclic Urea- or Lactam-Substituted Quinoxaline-Type Piperidines as ORL-1 Modulators Purdue Pharma L.P. In force Fee due Jan 21, 2027 Lapses if unpaid Jul 21, 2027 Term ends Jul 26, 2033 · High confidence	Purdue Pharma L.P.	In force	Jan 21, 2027	Jul 21, 2027	Term ends Jul 26, 2033	High confidence
US 9,090,618	Substituted Benzimidazole-Type Piperidine Compounds and Uses Thereof Purdue Pharma L.P. In force Fee due Jan 28, 2027 Lapses if unpaid Jul 28, 2027 Term ends Dec 23, 2033 · High confidence	Purdue Pharma L.P.	In force	Jan 28, 2027	Jul 28, 2027	Term ends Dec 23, 2033	High confidence
US 9,096,606	Quarternized Buprenorphine Analogs Purdue Pharma L.P. In force Fee due Feb 4, 2027 Lapses if unpaid Aug 4, 2027 Term ends Dec 7, 2032 · High confidence	Purdue Pharma L.P.	In force	Feb 4, 2027	Aug 4, 2027	Term ends Dec 7, 2032	High confidence
US 9,109,007	MHC-I Restricted Epitopes Containing Non-Natural Amino Acid Residues Purdue Pharma L.P. In force Fee due Feb 18, 2027 Lapses if unpaid Aug 18, 2027 Term ends Dec 7, 2031 · High confidence	Purdue Pharma L.P.	In force	Feb 18, 2027	Aug 18, 2027	Term ends Dec 7, 2031	High confidence
US 11,738,023	Treatment and Prevention of Sleep Disorders Purdue Pharma L.P. In force Fee due Feb 28, 2027 Lapses if unpaid Aug 30, 2027 Term ends Jul 25, 2037 · Medium confidence	Purdue Pharma L.P.	In force	Feb 28, 2027	Aug 30, 2027	Term ends Jul 25, 2037	Medium confidence
US 9,120,752	Pyridine Compounds as Sodium Channel Blockers Purdue Pharma L.P. In force Fee due Mar 1, 2027 Lapses if unpaid Sep 1, 2027 Term ends Jul 15, 2031 · High confidence	Purdue Pharma L.P.	In force	Mar 1, 2027	Sep 1, 2027	Term ends Jul 15, 2031	High confidence
US 9,120,786	Triazine Carboxamides as Sodium Channel Blockers Purdue Pharma L.P. In force Fee due Mar 1, 2027 Lapses if unpaid Sep 1, 2027 Term ends Feb 26, 2034 · High confidence	Purdue Pharma L.P.	In force	Mar 1, 2027	Sep 1, 2027	Term ends Feb 26, 2034	High confidence
US 10,398,690	Systems and Methods for Treating an Opioid-Induced Adverse Pharmacodynamic Response Purdue Pharma L.P. In force Fee due Mar 3, 2027 Lapses if unpaid Sep 3, 2027 Term ends Apr 17, 2033 · Low confidence	Purdue Pharma L.P.	In force	Mar 3, 2027	Sep 3, 2027	Term ends Apr 17, 2033	Low confidence
35 more maintenance fees coming due in the 12 months from Nov 15, 2026 · Pro

10 of 45 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.