Patent · US Expired

Polycondensates

US4124568A · kind A · utility

7Cited by

6References

12Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Wilfried Zecher · Leverkusen, DE
Willi Dunwald · Leverkusen, DE
Rudolf Merten · Leverkusen, DE

Key dates

Filing date	Nov 23, 1977
Grant date	Nov 7, 1978
Priority date	—
Expiry date	Nov 23, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2933
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the production of polycondensates linked by nitrogen containing five membered rings, wherein a unsaturated cyclic anhydride compound is polycondensed with alcohols and organic polyisocyanates.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.