Maintenance fees coming due

Exfo Inc.

13 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Feb 6, 2027. Unpaid by Aug 6, 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 10,371,596	Testing Fiber Arrangement in Multi-Fiber Cables Exfo Inc. In force Fee due Feb 6, 2027 Lapses if unpaid Aug 6, 2027 Term ends Jan 6, 2036 · High confidence	Exfo Inc.	In force	Feb 6, 2027	Aug 6, 2027	Term ends Jan 6, 2036	High confidence
US 9,106,334	Method and System for Common-Mode-Rejection-Ratio (CMRR) Characterization of an Integrated Coherent Receiver Exfo Inc. In force Fee due Feb 11, 2027 Lapses if unpaid Aug 11, 2027 Term ends May 9, 2034 · High confidence	Exfo Inc.	In force	Feb 11, 2027	Aug 11, 2027	Term ends May 9, 2034	High confidence
US 11,726,002	Optical Test Instrument with Removable Cartridge Exfo Inc. In force Fee due Feb 15, 2027 Lapses if unpaid Aug 16, 2027 Term ends Aug 28, 2039 · Low confidence	Exfo Inc.	In force	Feb 15, 2027	Aug 16, 2027	Term ends Aug 28, 2039	Low confidence
US 9,112,604	Reference-Based In-Band Osnr Measurement on Polarization-Multiplexed Signals Exfo Inc. In force Fee due Feb 18, 2027 Lapses if unpaid Aug 18, 2027 Term ends Dec 13, 2031 · High confidence	Exfo Inc.	In force	Feb 18, 2027	Aug 18, 2027	Term ends Dec 13, 2031	High confidence
US 9,134,197	Bi-Directional Multi-Pulsewidth Optical Time-Domain Reflectometer Exfo Inc. In force Fee due Mar 15, 2027 Lapses if unpaid Sep 15, 2027 Term ends Aug 30, 2033 · High confidence	Exfo Inc.	In force	Mar 15, 2027	Sep 15, 2027	Term ends Aug 30, 2033	High confidence
US 9,170,173	Multiple-Acquisition Otdr Method and Device Exfo Inc. In force Fee due Apr 27, 2027 Lapses if unpaid Oct 27, 2027 Term ends May 26, 2031 · High confidence	Exfo Inc.	In force	Apr 27, 2027	Oct 27, 2027	Term ends May 26, 2031	High confidence
US 11,821,808	Signature Recognition on Optical-Fiber Connector Endfaces Exfo Inc. In force Fee due May 21, 2027 Lapses if unpaid Nov 22, 2027 Term ends Mar 13, 2042 · High confidence	Exfo Inc.	In force	May 21, 2027	Nov 22, 2027	Term ends Mar 13, 2042	High confidence
US 11,879,802	Testing Optical Fiber Link Continuity Using Otdr Backscattering Patterns Exfo Inc. In force Fee due Jul 23, 2027 Lapses if unpaid Jan 24, 2028 Term ends Oct 19, 2041 · High confidence	Exfo Inc.	In force	Jul 23, 2027	Jan 24, 2028	Term ends Oct 19, 2041	High confidence
US 11,892,507	Early Detection of Quality Control Test Failures for Manufacturing End-To-End Testing Optimization Exfo Inc. In force Fee due Aug 6, 2027 Lapses if unpaid Feb 7, 2028 Term ends Oct 13, 2042 · High confidence	Exfo Inc.	In force	Aug 6, 2027	Feb 7, 2028	Term ends Oct 13, 2042	High confidence
US 11,906,389	System and Method for Assisting in Fiber Optic Splices Exfo Inc. In force Fee due Aug 20, 2027 Lapses if unpaid Feb 22, 2028 Term ends Aug 18, 2042 · High confidence	Exfo Inc.	In force	Aug 20, 2027	Feb 22, 2028	Term ends Aug 18, 2042	High 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.

Upgrade to Pro

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