Inventor

CHANG JOHN C

US21 patents

⚠️ This page may combine multiple inventors who share the name “CHANG JOHN C”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHANG JOHN C

MINNESOTA MINING & MFG

Treating fibrous polyamide articles

Process for providing polyamide materials with stain resistance with sulfonated novolak resin and polymethacrylic acd

Fluorochemical biuret compositions and fibrous substrates treated therewith

Fluoroaliphatic radical-containing, substituted guanidines and fibrous substrates treated therewith

Process for providing polyamide materials with stain resistance

Repellent and soil resistant carpet treated with ammonium polycarboxylate salts

Method for treating carpet using PH adjustment

Metal film imaging structure

Treated substrate having improved release properties

Method for treating carpets with polycarboxylate salts to enhance soil resistance and repellency

Fluorochemical biuret compounds and fibrous substrates treated therewith

Blend of fluorochemical guanidines and poly(oxyalkylenes)

3M INNOVATIVE PROPERTIES CO

Soil resistant curable laminate coating

Carpet treatment composition comprising polycarboxylate salts

Method for imparting soil and stain resistance to carpet

Method for imparting soil and stain resistance to carpet

Treatment of fibrous substrates with acidic silsesquioxanes emulsions

CHANG JOHN C

Divalent metal salts of sulfonated novolak resins and methods for treating fibrous polyamide materials therewith

(unassigned)

Carbon and alloy steels thermochemical treatments

UNION CARBIDE CHEM PLASTIC

Removal of sulfur dioxide from gas streams

OTIS ELEVATOR CO

Elevator door coupling device