Inventor
JOHNSON RALPH K
US7 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSON RALPH K”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ELSAG INT BV
5 patentsUS5060132AOct 22, 1991
Method of modeling and control for delignification of pulping
ELSAG INT BV30 citations90
US5032977AJul 16, 1991
System for modeling and control for delignification of pulping
ELSAG INT BV18 citations71
US4978425ADec 18, 1990
Method for controlling the degree of cooking in a digester
ELSAG INT BV9 citations71
US5032976AJul 16, 1991
System for modeling and control for delignification of pulping
ELSAG INT BV4 citations60
US4990219AFeb 5, 1991
Apparatus for controlling the degree of cooking in a digester
ELSAG INT BV5 citations60