Maintenance fees coming due
Celanese Eva Performance Polymers LLC
3 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Jan 4, 2027. Unpaid by Jul 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 11,690,806 | Implantable Device for Sustained Release of a Macromolecular Drug Compound In force Fee due Jan 4, 2027 Lapses if unpaid Jul 6, 2027 · High confidence | Celanese Eva Performance Polymers LLC | In force | Jan 4, 2027 | Jul 6, 2027 | High confidence | |
| US 11,690,807 | Implantable Device for Sustained Release of a Macromolecular Drug Compound In force Fee due Jan 4, 2027 Lapses if unpaid Jul 6, 2027 · High confidence | Celanese Eva Performance Polymers LLC | In force | Jan 4, 2027 | Jul 6, 2027 | High confidence | |
| US 11,951,215 | Implantable Device for Sustained Release of a Macromolecular Drug Compound In force Fee due Oct 9, 2027 Lapses if unpaid Apr 10, 2028 · Medium confidence | Celanese EVA Performance Polymers LLC | In force | Oct 9, 2027 | Apr 10, 2028 | Medium confidence |
3 of 3 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.