Patent · US Expired

Bead polymers of viscous dimethacrylates

US4277536A · kind A · utility

10Cited by

9References

4Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

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

Key dates

Filing date	Nov 13, 1979
Grant date	Jul 7, 1981
Priority date	—
Expiry date	Nov 13, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2982
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

Bead polymers having a mean bead diameter of from 10 to 200.mu. of one or more polymerized viscous methacrylates and/or dimethacrylates having a viscosity of from 0.5 to 500 Pa.s and, optionally, up to 20% by weight of one or more other vinyl monomers.

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