Maintenance fees coming due
5 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Apr 13, 2027. Unpaid by Oct 13, 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 9,160,569 | Messaging System and Method In force Fee due Apr 13, 2027 Lapses if unpaid Oct 13, 2027 · High confidence | Markport Limited | In force | Apr 13, 2027 | Oct 13, 2027 | High confidence | |
| US 9,264,883 | Method, Apparatus and Computer Readable Medium for Terminating and Newly Constructing a Send Routing Information (SRI) Message in Mobile Networks In force Fee due Aug 16, 2027 Lapses if unpaid Feb 16, 2028 · High confidence | Markport Limited | In force | Aug 16, 2027 | Feb 16, 2028 | High confidence | |
| US 10,587,540 | Group Messaging In force Fee due Sep 10, 2027 Lapses if unpaid Mar 10, 2028 · High confidence | Markport Limited | In force | Sep 10, 2027 | Mar 10, 2028 | High confidence | |
| US 9,338,179 | Message Flooding Prevention in Messaging Networks In force Fee due Nov 10, 2027 Lapses if unpaid May 10, 2028 · High confidence | Markport Limited | In force | Nov 10, 2027 | May 10, 2028 | High confidence | |
| US 9,338,618 | A Home Routing System and Method for Mobile Networks In force Fee due Nov 10, 2027 Lapses if unpaid May 10, 2028 · High confidence | Markport Limited | In force | Nov 10, 2027 | May 10, 2028 | High confidence |
5 of 5 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.