Maintenance fees coming due

Compass Pathfinder Limited

6 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Nov 30, 2026. Unpaid by Jun 1, 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 11,661,617	Processes for the Production of Tryptamines Compass Pathfinder Limited In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 Term ends Mar 8, 2039 · Medium confidence	Compass Pathfinder Limited	In force	Nov 30, 2026	Jun 1, 2027	Term ends Mar 8, 2039	Medium confidence
US 11,738,035	Method for Treating Anxiety Disorders, Headache Disorders, and Eating Disorders with Psilocybin Compass Pathfinder Limited In force Fee due Feb 28, 2027 Lapses if unpaid Aug 30, 2027 Term ends Apr 17, 2040 · High confidence	Compass Pathfinder Limited	In force	Feb 28, 2027	Aug 30, 2027	Term ends Apr 17, 2040	High confidence
US 11,851,451	Preparation of Psilocybin, Different Polymorphic Forms, Intermediates, Formulations and Their Use Compass Pathfinder Limited In force Fee due Jun 26, 2027 Lapses if unpaid Dec 27, 2027 Term ends Oct 9, 2038 · High confidence	Compass Pathfinder Limited	In force	Jun 26, 2027	Dec 27, 2027	Term ends Oct 9, 2038	High confidence
US 10,519,175	Preparation of Psilocybin, Different Polymorphic Forms, Intermediates, Formulations and Their Use Compass Pathfinder Limited In force Fee due Jun 30, 2027 Lapses if unpaid Jan 3, 2028 Term ends Oct 9, 2038 · High confidence	Compass Pathfinder Limited	In force	Jun 30, 2027	Jan 3, 2028	Term ends Oct 9, 2038	High confidence
US 11,865,126	Method for Treating Anxiety Disorders, Headache Disorders, and Eating Disorders with Psilocybin Compass Pathfinder Limited In force Fee due Jul 9, 2027 Lapses if unpaid Jan 10, 2028 Term ends Apr 17, 2040 · Low confidence	Compass Pathfinder Limited	In force	Jul 9, 2027	Jan 10, 2028	Term ends Apr 17, 2040	Low confidence
US 11,939,346	Preparation of Psilocybin, Different Polymorphic Forms, Intermediates, Formulations and Their Use Compass Pathfinder Limited In force Fee due Sep 26, 2027 Lapses if unpaid Mar 27, 2028 Term ends Oct 9, 2038 · High confidence	Compass Pathfinder Limited	In force	Sep 26, 2027	Mar 27, 2028	Term ends Oct 9, 2038	High confidence

6 of 6 patents shown. Soonest fee due date first, then patent number.

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