Maintenance fees coming due

Purdue Research Foundation

444 maintenance fees come due in the 12 months from Nov 15, 2026, the next on Nov 19, 2026. Unpaid by May 19, 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 9,035,239	Mass Spectrometry Analysis of Microorganisms in Samples Purdue Research Foundation In force Fee due Nov 19, 2026 Lapses if unpaid May 19, 2027 Term ends Apr 29, 2030 · High confidence	Purdue Research Foundation	In force	Nov 19, 2026	May 19, 2027	Term ends Apr 29, 2030	High confidence
US 10,298,470	Tracing Message Transmissions Between Communicating Network Devices Purdue Research Foundation In force Fee due Nov 21, 2026 Lapses if unpaid May 21, 2027 Term ends Dec 19, 2034 · High confidence	Purdue Research Foundation	In force	Nov 21, 2026	May 21, 2027	Term ends Dec 19, 2034	High confidence
US 11,656,164	Axially-Offset Differential Interference Contrast Correlation Spectroscopy Purdue Research Foundation In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends May 25, 2041 · High confidence	Purdue Research Foundation	In force	Nov 23, 2026	May 24, 2027	Term ends May 25, 2041	High confidence
US 11,656,302	Expandable Apparatus for Detecting RF Signals and Related Method Purdue Research Foundation In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends May 23, 2040 · High confidence	Purdue Research Foundation	In force	Nov 23, 2026	May 24, 2027	Term ends May 23, 2040	High confidence
US 11,656,386	Tunable Plasmonic Color Device and Method of Making the Same Purdue Research Foundation In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends Sep 30, 2036 · High confidence	Purdue Research Foundation	In force	Nov 23, 2026	May 24, 2027	Term ends Sep 30, 2036	High confidence
US 11,658,284	Sodium Powders for Use as Electrode Additives and Methods of Making and Using the Same Purdue Research Foundation In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends Jun 27, 2041 · High confidence	Purdue Research Foundation	In force	Nov 23, 2026	May 24, 2027	Term ends Jun 27, 2041	High confidence
US 11,658,350	Smart Battery Management Systems Purdue Research Foundation In force Fee due Nov 23, 2026 Lapses if unpaid May 24, 2027 Term ends Mar 11, 2041 · High confidence	Purdue Research Foundation	In force	Nov 23, 2026	May 24, 2027	Term ends Mar 11, 2041	High confidence
US 10,300,259	Smart Capsule with Gi-Tract-Location-Specific Payload Release Purdue Research Foundation In force Fee due Nov 28, 2026 Lapses if unpaid May 28, 2027 Term ends Apr 15, 2037 · High confidence	Purdue Research Foundation	In force	Nov 28, 2026	May 28, 2027	Term ends Apr 15, 2037	High confidence
US 10,301,664	Repurposing Non-Antimicrobial Drugs and Clinical Molecules to Treat Bacterial Infections Purdue Research Foundation In force Fee due Nov 28, 2026 Lapses if unpaid May 28, 2027 Term ends Apr 3, 2037 · High confidence	Purdue Research Foundation	In force	Nov 28, 2026	May 28, 2027	Term ends Apr 3, 2037	High confidence
US 10,305,408	Hybrid Surface Magnet Machine Purdue Research Foundation In force Fee due Nov 28, 2026 Lapses if unpaid May 28, 2027 Term ends Mar 25, 2035 · Low confidence	Purdue Research Foundation	In force	Nov 28, 2026	May 28, 2027	Term ends Mar 25, 2035	Low confidence
434 more maintenance fees coming due in the 12 months from Nov 15, 2026 · Pro

10 of 444 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.