Maintenance fees coming due
4 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Feb 4, 2027. Unpaid by Aug 4, 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 9,100,407 | Method and system to enhance performance of a session initiation protocol network and its elements In force Fee due Feb 4, 2027 Lapses if unpaid Aug 4, 2027 · High confidence | Cisco Systems | In force | Feb 4, 2027 | Aug 4, 2027 | High confidence | |
| US 11,910,351 | Systems and Methods for Determining Locations of Access Points In force Fee due Aug 20, 2027 Lapses if unpaid Feb 22, 2028 · Low confidence | Cisco Systems, Inc. | In force | Aug 20, 2027 | Feb 22, 2028 | Low confidence | |
| US 10,595,240 | Seamless Roaming for Clients Between Access Points with WPA-2 Encryption In force Fee due Sep 17, 2027 Lapses if unpaid Mar 17, 2028 · High confidence | Cisco Systems, Inc. | In force | Sep 17, 2027 | Mar 17, 2028 | High confidence | |
| US 9,319,332 | Distributed Rescheduling of Bounded Flows in a Time Sensitive Network In force Fee due Oct 19, 2027 Lapses if unpaid Apr 19, 2028 · High confidence | Cisco Systems, Inc. | In force | Oct 19, 2027 | Apr 19, 2028 | High confidence |
4 of 4 patents shown. Soonest fee due date first, then patent number.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.