Maintenance fees coming due

Tybalt, LLC

11 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Dec 6, 2026. Unpaid by Jun 7, 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 11,671,151	Efficient Peak-to-Average-Power Reduction for OFDM and MIMO-OFDM Tybalt, LLC In force Fee due Dec 6, 2026 Lapses if unpaid Jun 7, 2027 Term ends Aug 8, 2039 · High confidence	Tybalt, LLC	In force	Dec 6, 2026	Jun 7, 2027	Term ends Aug 8, 2039	High confidence
US 11,677,449	Eigensystem Optimization in Artificial Neural Networks Tybalt, LLC In force Fee due Dec 13, 2026 Lapses if unpaid Jun 14, 2027 Term ends Apr 24, 2039 · High confidence	Tybalt, LLC	In force	Dec 13, 2026	Jun 14, 2027	Term ends Apr 24, 2039	High confidence
US 11,700,162	Peak-to-Average-Power Reduction for OFDM Multiple Access Tybalt, LLC In force Fee due Jan 11, 2027 Lapses if unpaid Jul 12, 2027 Term ends Aug 22, 2038 · High confidence	Tybalt, LLC	In force	Jan 11, 2027	Jul 12, 2027	Term ends Aug 22, 2038	High confidence
US 10,444,766	Airborne Relays in Cooperative-MIMO Systems Tybalt, LLC In force Fee due Apr 15, 2027 Lapses if unpaid Oct 15, 2027 Term ends Jul 25, 2036 · High confidence	Tybalt, LLC	In force	Apr 15, 2027	Oct 15, 2027	Term ends Jul 25, 2036	High confidence
US 10,447,520	Efficient Peak-To-Average-Power Reduction for OFDM and MIMO-OFDM Tybalt, LLC In force Fee due Apr 15, 2027 Lapses if unpaid Oct 15, 2027 Term ends Jun 27, 2038 · High confidence	Tybalt, LLC	In force	Apr 15, 2027	Oct 15, 2027	Term ends Jun 27, 2038	High confidence
US 11,791,953	Non-Orthogonal Multiple Access Tybalt, LLC In force Fee due Apr 17, 2027 Lapses if unpaid Oct 18, 2027 Term ends Dec 27, 2040 · High confidence	Tybalt, LLC	In force	Apr 17, 2027	Oct 18, 2027	Term ends Dec 27, 2040	High confidence
US 10,505,774	Efficient Peak-To-Average-Power Reduction for OFDM and MIMO-OFDM Tybalt, LLC In force Fee due Jun 10, 2027 Lapses if unpaid Dec 10, 2027 Term ends Jun 27, 2038 · High confidence	Tybalt, LLC	In force	Jun 10, 2027	Dec 10, 2027	Term ends Jun 27, 2038	High confidence
US 10,514,709	Airborne Relays in Cooperative-MIMO Systems Tybalt, LLC In force Fee due Jun 24, 2027 Lapses if unpaid Dec 27, 2027 Term ends Oct 4, 2036 · High confidence	Tybalt, LLC	In force	Jun 24, 2027	Dec 27, 2027	Term ends Oct 4, 2036	High confidence
US 11,894,965	Efficient Synthesis and Analysis of OFDM and MIMO-OFDM Signals Tybalt, LLC In force Fee due Aug 6, 2027 Lapses if unpaid Feb 7, 2028 Term ends May 24, 2038 · High confidence	Tybalt, LLC	In force	Aug 6, 2027	Feb 7, 2028	Term ends May 24, 2038	High confidence
US 11,917,604	Orthogonal Multiple Access and Non-Orthogonal Multiple Access Tybalt, LLC In force Fee due Aug 27, 2027 Lapses if unpaid Feb 28, 2028 Term ends Jan 24, 2040 · High confidence	Tybalt, LLC	In force	Aug 27, 2027	Feb 28, 2028	Term ends Jan 24, 2040	High confidence
1 more maintenance fee coming due in the 12 months from Nov 14, 2026 · Pro

10 of 11 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.

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Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.