Maintenance fees coming due
3 maintenance fees come due in the 12 months from Nov 14, 2026, the next on Mar 5, 2027. Unpaid by Sep 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 11,747,259 | Temperature Adjusted Modulation of a Signal Center Wavelength in Liquid Absorption Spectroscopy In force Fee due Mar 5, 2027 Lapses if unpaid Sep 7, 2027 · High confidence | Airware | In force | Mar 5, 2027 | Sep 7, 2027 | High confidence | |
| US 10,473,586 | Enhanced Optical Data Capture Using NDIR for Liquids In force Fee due May 12, 2027 Lapses if unpaid Nov 12, 2027 · High confidence | Airware, Inc. | In force | May 12, 2027 | Nov 12, 2027 | High confidence | |
| US 11,892,400 | Reflective Depth Interrogation for Analyte Measurement in Liquids In force Fee due Aug 6, 2027 Lapses if unpaid Feb 7, 2028 · High confidence | Airware, Inc. | In force | Aug 6, 2027 | Feb 7, 2028 | High confidence |
3 of 3 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.