Maintenance fees coming due

Flosfia Inc.

12 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 6, 2026. Unpaid by Jun 7, 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 11,670,688	Semiconductor Apparatus Flosfia Inc. In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 Term ends Nov 15, 2038 · High confidence	Flosfia Inc.	In force	Dec 6, 2026	Jun 7, 2027	Term ends Nov 15, 2038	High confidence
US 11,682,702	Crystalline Semiconductor Film, Plate-Like Body and Semiconductor Device Flosfia Inc. In force Fee due Dec 20, 2026 Lapses if unpaid Jun 21, 2027 Term ends Jul 21, 2035 · Low confidence	Flosfia Inc.	In force	Dec 20, 2026	Jun 21, 2027	Term ends Jul 21, 2035	Low confidence
US 11,694,894	Crystalline Film Containing a Crystalline Metal Oxide and Method for Manufacturing the Same Under Partial Pressure Flosfia Inc. In force Fee due Jan 4, 2027 Lapses if unpaid Jul 6, 2027 Term ends May 21, 2041 · High confidence	Flosfia Inc.	In force	Jan 4, 2027	Jul 6, 2027	Term ends May 21, 2041	High confidence
US 10,439,028	Crystalline Semiconductor Film, Plate-Like Body and Semiconductor Device Flosfia Inc. In force Fee due Apr 8, 2027 Lapses if unpaid Oct 8, 2027 Term ends Jul 21, 2035 · High confidence	Flosfia Inc.	In force	Apr 8, 2027	Oct 8, 2027	Term ends Jul 21, 2035	High confidence
US 10,460,934	Crystalline Film, Semiconductor Device Including Crystalline Film, and Method for Producing Crystalline Film Flosfia Inc., National Institute for Materials Science, Kyoto University and Saga University In force Fee due Apr 29, 2027 Lapses if unpaid Oct 29, 2027 Term ends Aug 21, 2038 · High confidence	Flosfia Inc., National Institute for Materials Science, Kyoto University and Saga University	In force	Apr 29, 2027	Oct 29, 2027	Term ends Aug 21, 2038	High confidence
US 11,804,519	Crystalline Multilayer Structure, Semiconductor Device, and Method of Manufacturing Crystalline Structure Flosfia Inc. and National Institute for Materials Science In force Fee due Apr 30, 2027 Lapses if unpaid Nov 1, 2027 Term ends May 26, 2041 · High confidence	Flosfia Inc. and National Institute for Materials Science	In force	Apr 30, 2027	Nov 1, 2027	Term ends May 26, 2041	High confidence
US 11,855,135	Semiconductor Device Flosfia Inc. In force Fee due Jun 26, 2027 Lapses if unpaid Dec 27, 2027 Term ends Apr 16, 2042 · High confidence	Flosfia Inc.	In force	Jun 26, 2027	Dec 27, 2027	Term ends Apr 16, 2042	High confidence
US 10,535,728	Crystalline Multilayer Oxide Thin Films Structure in Semiconductor Device Flosfia Inc. In force Fee due Jul 14, 2027 Lapses if unpaid Jan 14, 2028 Term ends Dec 19, 2034 · High confidence	Flosfia Inc.	In force	Jul 14, 2027	Jan 14, 2028	Term ends Dec 19, 2034	High confidence
US 11,916,103	P-Type Oxide Semiconductor and Method for Manufacturing Same Flosfia Inc. In force Fee due Aug 27, 2027 Lapses if unpaid Feb 28, 2028 Term ends Jun 30, 2037 · High confidence	Flosfia Inc.	In force	Aug 27, 2027	Feb 28, 2028	Term ends Jun 30, 2037	High confidence
US 10,580,648	Semiconductor Device and Method of Manufacturing Semiconductor Device Flosfia Inc. and Kyoto University In force Fee due Sep 3, 2027 Lapses if unpaid Mar 3, 2028 Term ends Sep 4, 2038 · High confidence	Flosfia Inc. and Kyoto University	In force	Sep 3, 2027	Mar 3, 2028	Term ends Sep 4, 2038	High confidence
2 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 12 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.

Upgrade to Pro

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