Maintenance fees coming due
12 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Nov 30, 2026. Unpaid by Jun 1, 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 11,665,961 | Heterocyclic Compound and Organic Light Emitting Device Using Same In force Fee due Nov 30, 2026 Lapses if unpaid Jun 1, 2027 · High confidence | LT Materials Co., Ltd. | In force | Nov 30, 2026 | Jun 1, 2027 | High confidence | |
| US 11,678,576 | Heterocyclic Compound and Organic Light Emitting Element Comprising Same In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 · High confidence | LT Materials Co., Ltd. | In force | Dec 13, 2026 | Jun 14, 2027 | High confidence | |
| US 10,344,030 | Heterocyclic Compound and Organic Light Emitting Device Using Same In force Fee due Jan 9, 2027 Lapses if unpaid Jul 9, 2027 · High confidence | LT Materials Co., Ltd. | In force | Jan 9, 2027 | Jul 9, 2027 | High confidence | |
| US 10,381,577 | Hetero-Cyclic Compound and Organic Light Emitting Device Using the Same In force Fee due Feb 13, 2027 Lapses if unpaid Aug 13, 2027 · High confidence | LT Materials Co., Ltd. | In force | Feb 13, 2027 | Aug 13, 2027 | High confidence | |
| US 11,785,844 | Organic Light Emitting Device, Method for Manufacturing Same and Composition for Organic Material Layer In force Fee due Apr 10, 2027 Lapses if unpaid Oct 12, 2027 · High confidence | LT Materials Co., Ltd. | In force | Apr 10, 2027 | Oct 12, 2027 | High confidence | |
| US 10,446,765 | Heterocyclic Compound and Organic Light Emitting Element Using Same In force Fee due Apr 15, 2027 Lapses if unpaid Oct 15, 2027 · High confidence | LT Materials Co., Ltd. | In force | Apr 15, 2027 | Oct 15, 2027 | High confidence | |
| US 10,454,043 | Heterocyclic Compound and Organic Light-Emitting Element Using Same In force Fee due Apr 22, 2027 Lapses if unpaid Oct 22, 2027 · High confidence | LT Materials Co., Ltd. | In force | Apr 22, 2027 | Oct 22, 2027 | High confidence | |
| US 11,812,623 | Hetero-Cyclic Compound and Organic Light Emitting Device Using the Same In force Fee due May 7, 2027 Lapses if unpaid Nov 8, 2027 · High confidence | LT Materials Co., Ltd. | In force | May 7, 2027 | Nov 8, 2027 | High confidence | |
| US 11,827,623 | Heterocyclic Compound, Organic Light Emitting Diode Comprising Same, Composition for Organic Layer of Organic Light Emitting Diode, and Method for Manufacturing Organic Light Emitting Diode In force Fee due May 28, 2027 Lapses if unpaid Nov 29, 2027 · High confidence | LT Materials Co., Ltd. | In force | May 28, 2027 | Nov 29, 2027 | High confidence | |
| US 11,891,361 | Heterocyclic Compound and Organic Light Emitting Device Comprising Same In force Fee due Aug 6, 2027 Lapses if unpaid Feb 7, 2028 · High confidence | LT Materials Co., Ltd. | In force | Aug 6, 2027 | Feb 7, 2028 | High confidence | |
| 2 more maintenance fees coming due in the 12 months from Nov 15, 2026 · Pro | |||||||
10 of 12 patents shown. Soonest fee due date first, then patent number.
Pro members see every patent with a maintenance fee coming due: number, title, status, the due date, and the date it lapses if the fee goes unpaid through the grace period.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.