Patent · US Expired

Impression materials for dentistry

US4182829A · kind A · utility

29Cited by

10References

11Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Michael Walkowiak · Leverkusen, DE
Hans-Hermann Schulz · Leichlingen, DE
Hans J. Rosenkranz · Krefeld, DE

Key dates

Filing date	May 8, 1978
Grant date	Jan 8, 1980
Priority date	—
Expiry date	May 8, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G18/672
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention provides impression materials for use in dentistry comprising the reaction product of (a) a diisocyanate or triisocyanate, (b) a dihydroxy compound having a molecular weight of from 300 to 10,000 and (c) an unsaturated monohydroxy compound. The invention also includes processes for preparing said impression materials.

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