Patent · US Expired

Photosetting impression materials

US5179186A · kind A · utility

9Cited by

1References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Hanns P. Muller · Leverkusen, DE
Reiner Voigt · Leverkusen, DE
Jens Winkel · Cologne, DE
Peter Schwabe · Leverkusen, DE

Key dates

Filing date	May 28, 1991
Grant date	Jan 12, 1993
Priority date	—
Expiry date	May 28, 2011

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K6/90
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A method of making a dental impression which comprises applying to the structure of which an impression is to be made a special prepolymer. The prepolymer is composed of units of at least one macrodiol, at least one aliphatic polyisocyanate, and an unsaturated monoalcohol as chain terminator, wherein the average functionality of the prepolymer based on the unsaturated groups is >2.

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