Maintenance fees coming due

NTT, Inc.

21 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Nov 19, 2026. Unpaid by May 19, 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 9,036,958	Optical Component Nippon Telegraph and Telephone Corporation and NTT Electronics Corporation In force Fee due Nov 19, 2026 Lapses if unpaid May 19, 2027 Term ends Mar 13, 2032 · High confidence	Nippon Telegraph and Telephone Corporation and NTT Electronics Corporation	In force	Nov 19, 2026	May 19, 2027	Term ends Mar 13, 2032	High confidence
US 10,310,159	Optical Waveguide Device NTT Electronics Corporation and Nippon Telegraph and Telephone Corporation In force Fee due Dec 4, 2026 Lapses if unpaid Jun 4, 2027 Term ends Jun 1, 2036 · High confidence	NTT Electronics Corporation and Nippon Telegraph and Telephone Corporation	In force	Dec 4, 2026	Jun 4, 2027	Term ends Jun 1, 2036	High confidence
US 11,710,226	Image Evaluation Device, Image Evaluation Method, And Image Evaluation Program NTT, Inc. In force Fee due Jan 25, 2027 Lapses if unpaid Jul 26, 2027 Ends no later than May 22, 2038 · Low confidence	NTT, Inc.	In force	Jan 25, 2027	Jul 26, 2027	Ends no later than May 22, 2038	Low confidence
US 10,374,718	Optical Transmission Distortion Compensation Device, Optical Transmission Distortion Compensation Method, and Communication Device NTT Innovative Devices Corporation In force Fee due Feb 6, 2027 Lapses if unpaid Aug 6, 2027 Term ends Jun 21, 2037 · High confidence	NTT Innovative Devices Corporation	In force	Feb 6, 2027	Aug 6, 2027	Term ends Jun 21, 2037	High confidence
US 9,106,408	Signature Processing System, Key Generation Device, Signature Device, Verification Device, Signature Processing Method, and Signature Processing Program NTT, Inc. In force Fee due Feb 11, 2027 Lapses if unpaid Aug 11, 2027 Term ends May 18, 2032 · High confidence	NTT, Inc.	In force	Feb 11, 2027	Aug 11, 2027	Term ends May 18, 2032	High confidence
US 10,389,452	Coherent Optical Reception Device NTT Innovative Devices Corporation In force Fee due Feb 20, 2027 Lapses if unpaid Aug 20, 2027 Term ends Oct 17, 2036 · High confidence	NTT Innovative Devices Corporation	In force	Feb 20, 2027	Aug 20, 2027	Term ends Oct 17, 2036	High confidence
US 9,116,291	Integrated Optical Module Nippon Telegraph and Telephone Corporation and NTT Electronics Corporation In force Fee due Feb 25, 2027 Lapses if unpaid Aug 25, 2027 Term ends Jul 26, 2033 · High confidence	Nippon Telegraph and Telephone Corporation and NTT Electronics Corporation	In force	Feb 25, 2027	Aug 25, 2027	Term ends Jul 26, 2033	High confidence
US 9,116,317	Planar Lightwave Circuit Nippon Telegraph and Telephone Corporation and NTT Electronics Corporation In force Fee due Feb 25, 2027 Lapses if unpaid Aug 25, 2027 Term ends Apr 2, 2033 · High confidence	Nippon Telegraph and Telephone Corporation and NTT Electronics Corporation	In force	Feb 25, 2027	Aug 25, 2027	Term ends Apr 2, 2033	High confidence
US 10,419,127	Phase Compensation Device, Phase Compensation Method and Communication Apparatus NTT Electronics Corporation and Nippon Telegraph and Telephone Corporation In force Fee due Mar 17, 2027 Lapses if unpaid Sep 17, 2027 Term ends Apr 13, 2037 · High confidence	NTT Electronics Corporation and Nippon Telegraph and Telephone Corporation	In force	Mar 17, 2027	Sep 17, 2027	Term ends Apr 13, 2037	High confidence
US 11,762,144	Multicore Optical Fiber and Design Method NTT, Inc. In force Fee due Mar 19, 2027 Lapses if unpaid Sep 20, 2027 Term ends Jun 16, 2040 · High confidence	NTT, Inc.	In force	Mar 19, 2027	Sep 20, 2027	Term ends Jun 16, 2040	High confidence
11 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 21 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.