Maintenance fees coming due
2 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Jan 9, 2027. Unpaid by Jul 9, 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 10,343,104 | Removing Carbon Nanotubes from a Continuous Reactor Effluent In force Fee due Jan 9, 2027 Lapses if unpaid Jul 9, 2027 · Medium confidence | ExxonMobil Upstream Research Company | In force | Jan 9, 2027 | Jul 9, 2027 | Medium confidence | |
| US 10,351,974 | Feedstocks for Forming Carbon Allotropes In force Fee due Jan 16, 2027 Lapses if unpaid Jul 16, 2027 · High confidence | ExxonMobil Upstream Research Company | In force | Jan 16, 2027 | Jul 16, 2027 | 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.