Maintenance fees coming due

RIKEN

78 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Nov 23, 2026. Unpaid by May 24, 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 11,655,347	Organic-Inorganic Hybrid Membrane Hyomen Kaimen Kobo Corporation and RIKEN Technos Corporation In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends Apr 18, 2039 · High confidence	Hyomen Kaimen Kobo Corporation and RIKEN Technos Corporation	In force	Nov 23, 2026	May 24, 2027	Term ends Apr 18, 2039	High confidence
US 11,656,159	Composition for Preparing Biological Material Having Excellent Light Transmissivity and Use of Composition RIKEN In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends Apr 27, 2039 · High confidence	RIKEN	In force	Nov 23, 2026	May 24, 2027	Term ends Apr 27, 2039	High confidence
US 9,040,918	Terahertz Wave Detection Device and Method RIKEN In force Fee due Nov 26, 2026 Lapses if unpaid May 26, 2027 Term ends Apr 9, 2034 · High confidence	RIKEN	In force	Nov 26, 2026	May 26, 2027	Term ends Apr 9, 2034	High confidence
US 11,668,696	Mask Structure Optimization Device, Mask Structure Optimization Method, and Program RIKEN and Thinkcyte, Inc. In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 Term ends Jan 30, 2039 · Medium confidence	RIKEN and Thinkcyte, Inc.	In force	Dec 6, 2026	Jun 7, 2027	Term ends Jan 30, 2039	Medium confidence
US 11,669,541	Data Interpretation Apparatus, Method, and Program, Data Integration Apparatus, Method, and Program, and Digital City Establishing System RIKEN In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 Term ends Jul 27, 2040 · High confidence	RIKEN	In force	Dec 6, 2026	Jun 7, 2027	Term ends Jul 27, 2040	High confidence
US 10,316,332	Cell for Immunotherapy, Including Modified Nucleic Acid Construct Encoding Wilms Tumor Gene Product RIKEN In force Fee due Dec 11, 2026 Lapses if unpaid Jun 11, 2027 Term ends Jul 30, 2032 · Medium confidence	RIKEN	In force	Dec 11, 2026	Jun 11, 2027	Term ends Jul 30, 2032	Medium confidence
US 10,321,552	Undulator Magnet Array and Undulator RIKEN In force Fee due Dec 11, 2026 Lapses if unpaid Jun 11, 2027 Term ends Nov 3, 2035 · High confidence	RIKEN	In force	Dec 11, 2026	Jun 11, 2027	Term ends Nov 3, 2035	High confidence
US 11,672,851	NY-ESO-1-Containing Artificial Adjuvant Vector Cell for Use in Treatment of Cancer RIKEN In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends Dec 1, 2040 · High confidence	RIKEN	In force	Dec 13, 2026	Jun 14, 2027	Term ends Dec 1, 2040	High confidence
US 11,676,361	Computer-Readable Recording Medium Having Stored Therein Training Program, Training Method, and Information Processing Apparatus Fujitsu Limited, RIKEN and National Cancer Center In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends Dec 12, 2041 · High confidence	Fujitsu Limited, RIKEN and National Cancer Center	In force	Dec 13, 2026	Jun 14, 2027	Term ends Dec 12, 2041	High confidence
US 10,332,648	Charge Stripping Film for Charge Stripping Device of Ion Beam Kaneka Corporation and RIKEN In force Fee due Dec 25, 2026 Lapses if unpaid Jun 25, 2027 Term ends Apr 14, 2036 · High confidence	Kaneka Corporation and RIKEN	In force	Dec 25, 2026	Jun 25, 2027	Term ends Apr 14, 2036	High confidence
68 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 78 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.

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