Maintenance fees coming due
Quantum Designed Materials Ltd.
1 maintenance fee comes due on Dec 20, 2026, in the 12 months from Nov 14, 2026. Unpaid by Jun 21, 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 11,683,997 | Superconducting Compounds and Methods for Making the Same In force Fee due Dec 20, 2026 Lapses if unpaid Jun 21, 2027 · High confidence | Quantum Designed Materials Ltd. | In force | Dec 20, 2026 | Jun 21, 2027 | High confidence |
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