Water and salt resistant solid super-acid catalysts
US11478164B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Sep 11, 2014 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | May 7, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/757
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods for preserving catalytic activity of a PSA polymer membrane in a humid environment by immobilizing in the membrane an organic acid having a pKa greater than the pKa of the PSA polymer membrane; optical sensors based on the PSA membranes further including an immobilized organic reagent capable of reacting with a target compound in a humid environment to produce a detectable color shifted product; and non-invasive methods for estimating blood glucose concentration by utilizing an optical sensor to detect concentration of acetone in exhaled human breath and correlating it to blood glucose concentration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.