Maintenance fees coming due

Kai Concepts, LLC

7 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Mar 12, 2027. Unpaid by Sep 13, 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 11,753,120	Hydrojet Propulsion System Kai Concepts, LLC In force Fee due Mar 12, 2027 Lapses if unpaid Sep 13, 2027 Term ends Nov 9, 2041 · High confidence	Kai Concepts, LLC	In force	Mar 12, 2027	Sep 13, 2027	Term ends Nov 9, 2041	High confidence
US 11,801,914	Anisotropically Flexible Vibration Isolating Coupling Mechanism Kai Concepts, LLC In force Fee due Apr 30, 2027 Lapses if unpaid Nov 1, 2027 Term ends Oct 22, 2040 · High confidence	Kai Concepts, LLC	In force	Apr 30, 2027	Nov 1, 2027	Term ends Oct 22, 2040	High confidence
US 11,801,919	Waterproof Container Having a Waterproof Electrical Connector Kai Concepts, LLC In force Fee due Apr 30, 2027 Lapses if unpaid Nov 1, 2027 Term ends Oct 22, 2040 · High confidence	Kai Concepts, LLC	In force	Apr 30, 2027	Nov 1, 2027	Term ends Oct 22, 2040	High confidence
US 11,878,775	Leash System and Methods of Use Kai Concepts, LLC In force Fee due Jul 23, 2027 Lapses if unpaid Jan 24, 2028 Term ends Jun 22, 2042 · High confidence	Kai Concepts, LLC	In force	Jul 23, 2027	Jan 24, 2028	Term ends Jun 22, 2042	High confidence
US 11,897,583	Watercraft Device with Hydrofoil and Electric Propulsion System Kai Concepts, LLC In force Fee due Aug 13, 2027 Lapses if unpaid Feb 14, 2028 Term ends Aug 1, 2041 · High confidence	Kai Concepts, LLC	In force	Aug 13, 2027	Feb 14, 2028	Term ends Aug 1, 2041	High confidence
US 11,919,608	Watercraft Device with Hydrofoil and Electric Propeller System Kai Concepts, LLC In force Fee due Sep 5, 2027 Lapses if unpaid Mar 6, 2028 Term ends Jan 13, 2038 · Medium confidence	Kai Concepts, LLC	In force	Sep 5, 2027	Mar 6, 2028	Term ends Jan 13, 2038	Medium confidence
US 10,597,118	Watercraft Device with Hydrofoil and Electric Propeller System Kai Concepts, LLC In force Fee due Sep 24, 2027 Lapses if unpaid Mar 24, 2028 Term ends Sep 11, 2037 · High confidence	Kai Concepts, LLC	In force	Sep 24, 2027	Mar 24, 2028	Term ends Sep 11, 2037	High confidence

7 of 7 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.