Amorphous (per) fluorinated polymers
US6828388B2 · kind B2 · utility
6Cited by
8References
27Claims
0Family size
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Key dates
| Filing date | May 2, 2002 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jul 2, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Amorphous perfluorinated or fluorinated polymers containing an amount lower than 0.05 mmoles/kg polymer of each of the following ionic end groups: COF, COOH, their esters or salts, when the used determination method for said end groups is the Fourier Transform IR spectroscopy by Nicolet® Nexus FT-IR equipment (256 scannings, resolution 2 cm−1)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.