Patent · US Expired

Dental investment compounds in the form of a powder with improved flow properties

US5304239A · kind A · utility

7Cited by

2References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Peter Schwabe · Leverkusen, DE
Karl-Wilhelm Theis · Leichlingen, DE
Reiner Voight · Leverkusen, DE
Jens Winkel · Cologne, DE

Key dates

Filing date	Apr 5, 1991
Grant date	Apr 19, 1994
Priority date	—
Expiry date	Apr 5, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2111/00836
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

In the preparation of a dental appliance wherein an investment compound is mixed with a liquid and then cast, the improvement wherein the investment compound is a plaster- or phosphate-bound investment compound which is free of an anionic surface-active agent and containing an iso-paraffin of the formula ##STR1## in which n denotes 2, 3, 4 or 5.

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