Maintenance fees coming due
6 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Mar 8, 2027. Unpaid by Sep 8, 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 9,127,014 | Transition Metal-Catalyzed Processes for the Preparation of N-Allyl Compounds and Use Thereof In force Fee due Mar 8, 2027 Lapses if unpaid Sep 8, 2027 · High confidence | Noramco, LLC | In force | Mar 8, 2027 | Sep 8, 2027 | High confidence | |
| US 10,406,152 | Acetate Salt of Buprenorphine and Methods for Preparing Buprenorphine In force Fee due Mar 10, 2027 Lapses if unpaid Sep 10, 2027 · High confidence | Noramco, LLC | In force | Mar 10, 2027 | Sep 10, 2027 | High confidence | |
| US 10,544,434 | Process for the Preparation of Lisdexamfetamine and Related Derivatives In force Fee due Jul 28, 2027 Lapses if unpaid Jan 28, 2028 · High confidence | Noramco, LLC | In force | Jul 28, 2027 | Jan 28, 2028 | High confidence | |
| US 9,309,258 | Process for N-Dealkylation of Tertiary Amines In force Fee due Oct 12, 2027 Lapses if unpaid Apr 12, 2028 · High confidence | Noramco, LLC | In force | Oct 12, 2027 | Apr 12, 2028 | High confidence | |
| US 9,315,514 | 1,3-Dioxanomorphides and 1,3-Dioxanocodides In force Fee due Oct 19, 2027 Lapses if unpaid Apr 19, 2028 · High confidence | Noramco, LLC | In force | Oct 19, 2027 | Apr 19, 2028 | High confidence | |
| US 10,626,120 | N-Demethylation of Morphinan Alkaloids In force Fee due Oct 21, 2027 Lapses if unpaid Apr 21, 2028 · High confidence | Noramco, LLC | In force | Oct 21, 2027 | Apr 21, 2028 | High confidence |
6 of 6 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.