Maintenance fees coming due

Subcom

13 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Jan 2, 2027. Unpaid by Jul 2, 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 10,337,652	Separation Duct Having Longitudinal Spacers Subcom, LLC In force Fee due Jan 2, 2027 Lapses if unpaid Jul 2, 2027 Term ends Aug 29, 2037 · High confidence	Subcom, LLC	In force	Jan 2, 2027	Jul 2, 2027	Term ends Aug 29, 2037	High confidence
US 10,374,725	Power Delivery in Submarine Optical Communication Systems Using Power Feed Converters Subcom, LLC In force Fee due Feb 6, 2027 Lapses if unpaid Aug 6, 2027 Term ends Oct 4, 2037 · High confidence	Subcom, LLC	In force	Feb 6, 2027	Aug 6, 2027	Term ends Oct 4, 2037	High confidence
US 9,104,521	System and Method for Remote Device Application Upgrades Subcom, LLC In force Fee due Feb 11, 2027 Lapses if unpaid Aug 11, 2027 Term ends Oct 8, 2031 · High confidence	Subcom, LLC	In force	Feb 11, 2027	Aug 11, 2027	Term ends Oct 8, 2031	High confidence
US 10,382,123	Techniques for Parameter Reporting of Elements in an Optical Transmission System Using High Loss Loopback (HLLB) Data and a Line Monitoring System Implementing the Same Subcom, LLC In force Fee due Feb 13, 2027 Lapses if unpaid Aug 13, 2027 Term ends Jan 12, 2038 · High confidence	Subcom, LLC	In force	Feb 13, 2027	Aug 13, 2027	Term ends Jan 12, 2038	High confidence
US 10,404,362	Fault Detection and Reporting in Line Monitoring Systems Subcom, LLC In force Fee due Mar 3, 2027 Lapses if unpaid Sep 3, 2027 Term ends Mar 27, 2038 · High confidence	Subcom, LLC	In force	Mar 3, 2027	Sep 3, 2027	Term ends Mar 27, 2038	High confidence
US 9,130,672	System and Method for Fault Identification in Optical Communication Systems Subcom, LLC In force Fee due Mar 8, 2027 Lapses if unpaid Sep 8, 2027 Term ends May 6, 2033 · High confidence	Subcom, LLC	In force	Mar 8, 2027	Sep 8, 2027	Term ends May 6, 2033	High confidence
US 9,160,445	Method and System for Fault Recovery in an Optical Network Subcom, LLC In force Fee due Apr 13, 2027 Lapses if unpaid Oct 13, 2027 Term ends Jul 13, 2031 · High confidence	Subcom, LLC	In force	Apr 13, 2027	Oct 13, 2027	Term ends Jul 13, 2031	High confidence
US 10,454,611	Spatial Division Multiplexing in Limited Power Optical Communication Systems Subcom, LLC In force Fee due Apr 22, 2027 Lapses if unpaid Oct 22, 2027 Term ends Sep 9, 2034 · Medium confidence	Subcom, LLC	In force	Apr 22, 2027	Oct 22, 2027	Term ends Sep 9, 2034	Medium confidence
US 10,498,438	Automatic Calibration of Loopback Data in Line Monitoring Systems Subcom, LLC In force Fee due Jun 3, 2027 Lapses if unpaid Dec 3, 2027 Term ends Jan 19, 2038 · High confidence	Subcom, LLC	In force	Jun 3, 2027	Dec 3, 2027	Term ends Jan 19, 2038	High confidence
US 10,523,355	System and Method for Applying System Policies in an Optical Communication System Having User-Allocated Bandwidth Subcom, LLC In force Fee due Jun 30, 2027 Lapses if unpaid Jan 3, 2028 Term ends Jul 10, 2034 · Low confidence	Subcom, LLC	In force	Jun 30, 2027	Jan 3, 2028	Term ends Jul 10, 2034	Low confidence
3 more maintenance fees coming due in the 12 months from Nov 14, 2026 · Pro

10 of 13 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.