Maintenance fees coming due
4 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 2, 2026. Unpaid by Jun 2, 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 9,044,641 | Portable Doorway Recreation Apparatus In force Fee due Dec 2, 2026 Lapses if unpaid Jun 2, 2027 · Medium confidence | Debco LLC | In force | Dec 2, 2026 | Jun 2, 2027 | Medium confidence | |
| US 10,343,079 | Toy Building Brick System In force Fee due Jan 9, 2027 Lapses if unpaid Jul 9, 2027 · High confidence | Debco LLC | In force | Jan 9, 2027 | Jul 9, 2027 | High confidence | |
| US 10,583,369 | Peel and Stick Apparatuses for Building Blocks, Systems and Methods of Using the Same In force Fee due Sep 10, 2027 Lapses if unpaid Mar 10, 2028 · High confidence | Debco LLC | In force | Sep 10, 2027 | Mar 10, 2028 | High confidence | |
| US 10,646,791 | Toy Building Brick System In force Fee due Nov 12, 2027 Lapses if unpaid May 12, 2028 · High confidence | Debco LLC | In force | Nov 12, 2027 | May 12, 2028 | High confidence |
4 of 4 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.