Maintenance fees coming due
2 maintenance fees come due in the 12 months from Nov 14, 2026, the next on May 19, 2027. Unpaid by Nov 19, 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 10,478,510 | Plant Virus Particles for Delivery of Antimitotic Agents In force Fee due May 19, 2027 Lapses if unpaid Nov 19, 2027 · High confidence | Case Western Resrve University | In force | May 19, 2027 | Nov 19, 2027 | High confidence | |
| US 11,861,681 | System and Method for Integrated Retail and Ecommerce Shopping Platforms In force Fee due Jul 2, 2027 Lapses if unpaid Jan 3, 2028 · High confidence | Case Equity Partners | In force | Jul 2, 2027 | Jan 3, 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.