Inventor
RUF FRIEDRICH
DE11 patents
⚠️ This page may combine multiple inventors who share the name “RUF FRIEDRICH”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SUED CHEMIE AG
4 patentsUS6277490B1Aug 21, 2001
Color developer pigment for carbonless copying paper
SUED CHEMIE AG18 citations91
US5401568AMar 28, 1995
Coated fillers having silicic acid for heat-sensitive recording materials
SUED CHEMIE AG22 citations91
US5039377AAug 13, 1991
Bleaching paper pulp with modified silicate ion exchanger and hydrogen peroxide
SUED CHEMIE AG10 citations70
US5637552AJun 10, 1997
Process for producing neutral to alkali color developer pigments
SUED CHEMIE AG2 citations60