Malic acid polymers
US4320753A · kind A · utility
5Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1979 |
| Grant date | Mar 23, 1982 |
| Priority date | — |
| Expiry date | Nov 9, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L17/105
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A polymer containing repeating units of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are independently hydrogen, alkyl, aryl, aralkyl, substituted alkyl, substituted aryl, substituted aralkyl, R.sub.3 is hydrogen, alkyl or CH.sub.2n COOR.sub.8 where n is an integer of 0 to 10, R.sub.6 is OR or NR.sub.4 R.sub.5, wherein R and R.sub.8 are independently hydrogen or a group derived from a compound containing esterifiable hydroxyl groups, R.sub.4 and R.sub.5 are independently alkyl, aryl, aralkyl, substituted alkyl, substituted aryl, substituted aralkyl or together comprise an alkylene group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.