Maintenance fees coming due

Zenflow, Inc.

4 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Apr 3, 2027. Unpaid by Oct 4, 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 11,771,575	Systems, Devices, and Methods for the Accurate Deployment and Imaging of an Implant in the Prostatic Urethra Zenflow, Inc. In force Fee due Apr 3, 2027 Lapses if unpaid Oct 4, 2027 Term ends May 21, 2042 · High confidence	Zenflow, Inc.	In force	Apr 3, 2027	Oct 4, 2027	Term ends May 21, 2042	High confidence
US 11,813,184	Systems and Methods for Implants and Deployment Devices Zenflow, Inc. In force Fee due May 14, 2027 Lapses if unpaid Nov 15, 2027 Term ends Feb 16, 2038 · Medium confidence	Zenflow, Inc.	In force	May 14, 2027	Nov 15, 2027	Term ends Feb 16, 2038	Medium confidence
US 11,890,213	Systems, Devices, and Methods for the Accurate Deployment and Imaging of an Implant in the Prostatic Urethra Zenflow, Inc. In force Fee due Aug 6, 2027 Lapses if unpaid Feb 7, 2028 Term ends Sep 7, 2041 · High confidence	Zenflow, Inc.	In force	Aug 6, 2027	Feb 7, 2028	Term ends Sep 7, 2041	High confidence
US 11,903,859	Methods for Deployment of an Implant Zenflow, Inc. In force Fee due Aug 20, 2027 Lapses if unpaid Feb 22, 2028 Term ends Dec 8, 2037 · High confidence	Zenflow, Inc.	In force	Aug 20, 2027	Feb 22, 2028	Term ends Dec 8, 2037	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.