Maintenance fees coming due

Collagen Matrix, Inc.

4 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Dec 23, 2026. Unpaid by Jun 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 9,061,464	Re-Rollable Wrapping Implant Collagen Matrix, Inc. In force Fee due Dec 23, 2026 Lapses if unpaid Jun 23, 2027 Term ends Jan 23, 2031 · High confidence	Collagen Matrix, Inc.	In force	Dec 23, 2026	Jun 23, 2027	Term ends Jan 23, 2031	High confidence
US 10,537,417	Density Gradient Biopolymeric Matrix Implants Collagen Matrix, Inc. In force Fee due Jul 21, 2027 Lapses if unpaid Jan 21, 2028 Term ends Jun 10, 2037 · High confidence	Collagen Matrix, Inc.	In force	Jul 21, 2027	Jan 21, 2028	Term ends Jun 10, 2037	High confidence
US 9,308,219	Flat Self-Curling Permeable Sheet Membrane Collagen Matrix, Inc. In force Fee due Oct 12, 2027 Lapses if unpaid Apr 12, 2028 Term ends Jun 30, 2031 · High confidence	Collagen Matrix, Inc.	In force	Oct 12, 2027	Apr 12, 2028	Term ends Jun 30, 2031	High confidence
US 11,969,349	Implants for Bone and Cartilage Repair Collagen Matrix, Inc. In force Fee due Oct 30, 2027 Lapses if unpaid May 1, 2028 Term ends Aug 7, 2032 · High confidence	Collagen Matrix, Inc.	In force	Oct 30, 2027	May 1, 2028	Term ends Aug 7, 2032	High confidence

4 of 4 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.