Thermotropic liquid crystalline aromatic polyesters of disubstituted 4,4'-dihydroxydiphenylene
US4923947A · kind A · utility
9Cited by
2References
13Claims
0Family size
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Key dates
| Filing date | Jan 12, 1989 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Jan 12, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/60
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Thermotropic liquid crystalline aromatic polyesters of 4,4'-dihydroxydiphenyl substituted in 3,3' positions by a halogen or by an alkyl, cycloalkyl or aralkyl radical.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.