Patent · US Expired

Dental materials which are opaque to X-rays and are based on organic plastics in paste form

US4302376A · kind A · utility

26Cited by

2References

13Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Michael Walkowiak · Leverkusen, DE
Wolfgang Podszun · Neunburg vorm Wald, DE
Bernhard Leusner · Leverkusen, DE
Carlhans Suling · Odenthal, DE
Hans-Hermann Schulz · Leichlingen, DE

Key dates

Filing date	Nov 19, 1979
Grant date	Nov 24, 1981
Priority date	—
Expiry date	Nov 19, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S528/92
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention provides dental materials which are opaque to X-rays and are based on organic plastics in paste form, which comprises (a) a polymerizable binder, (b) a crosslinked bead polymer and (c) an X-ray contrast medium. The materials can also contain as an additional component (d) a fine-particled inorganic filler which is not opaque to X-rays. The materials are useful, inter alia, for filing dental cavities.

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