Maintenance fees coming due
2 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Aug 6, 2027. Unpaid by Feb 7, 2028, 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 11,891,431 | Removal of Serine Proteases by Treatment with Finely Divided Silicon Dioxide In force Fee due Aug 6, 2027 Lapses if unpaid Feb 7, 2028 · Medium confidence | Baxalta GmbH and Baxalta Incorporated | In force | Aug 6, 2027 | Feb 7, 2028 | Medium confidence | |
| US 10,626,166 | Detection of Cho-Mif Contaminations In force Fee due Oct 21, 2027 Lapses if unpaid Apr 21, 2028 · High confidence | Baxalta Incorporated and Baxter Healthcare S.A. | In force | Oct 21, 2027 | Apr 21, 2028 | High confidence |
2 of 2 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.