Inventor
HWA CHIH M
US26 patents
⚠️ This page may combine multiple inventors who share the name “HWA CHIH M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GRACE W R & CO
18 patentsUS5019343AMay 28, 1991
Control of corrosion in aqueous systems using certain phosphonomethyl amines
GRACE W R & CO63 citations95
US4649025AMar 10, 1987
Anti-corrosion composition
GRACE W R & CO55 citations95
US5069798ADec 3, 1991
Control of scale in aqueous systems using certain phosphonomethyl amines
GRACE W R & CO29 citations92
US4631131ADec 23, 1986
Method for inhibiting scale
GRACE W R & CO37 citations92
US5244600ASep 14, 1993
Method of scavenging oxygen in aqueous systems
GRACE W R & CO46 citations91
US4847001AJul 11, 1989
Control of corrosion in aqueous systems
GRACE W R & CO25 citations91
US5176849AJan 5, 1993
Composition and method for scavenging oxygen
GRACE W R & CO33 citations90
US4977292ADec 11, 1990
4-phosphonomethyl-2-hydroxy-2-oxo-1,4,2-oxazaphosphorinane N-oxide and water-soluble salts thereof
GRACE W R & CO44 citations90
US4973744ANov 27, 1990
Ethoxylated N,N-bis-phosphonomethyl 2-(hydroxy)ethylamine N-oxides and water-soluble salts thereof
GRACE W R & CO24 citations90
US4600524AJul 15, 1986
Composition and method for inhibiting scale
GRACE W R & CO25 citations82
US5183574AFeb 2, 1993
Method of dispersing iron
GRACE W R & CO18 citations81
US4980128ADec 25, 1990
Control of corrosion in aqueous systems
GRACE W R & CO19 citations81
US5167866ADec 1, 1992
Control of corrosion in aqueous systems using certain phosphonomethyl amine oxides
GRACE W R & CO8 citations73
US5096595AMar 17, 1992
Control of scale in aqueous systems using certain phosphonomethyl amine oxides
GRACE W R & CO10 citations73
US5051532ASep 24, 1991
N,N-bis-phosphonomethyl taurine N-oxide and water-soluble salts thereof
GRACE W R & CO12 citations73
US5587109ADec 24, 1996
Method for inhibition of oxygen corrosion in aqueous systems by the use of a tannin activated oxygen scavenger
GRACE W R & CO10 citations69
US4680125AJul 14, 1987
Method of inhibiting the deposition of scale in an aqueous system
GRACE W R & CO6 citations63
US4609483ASep 2, 1986
Scale inhibiting composition
GRACE W R & CO3 citations63
CHEMED CORP
6 patentsUS4098720AJul 4, 1978
Corrosion inhibition
CHEMED CORP60 citations96
US4067690AJan 10, 1978
Boiler water treatment
CHEMED CORP67 citations95
US4306991ADec 22, 1981
Scale inhibition
CHEMED CORP33 citations92
US4255259AMar 10, 1981
Scale inhibition
CHEMED CORP49 citations92
US4134959AJan 16, 1979
Azole-phosphate corrosion inhibiting composition and method
CHEMED CORP50 citations90
US4190421AFeb 26, 1980
Fireside treating compositions
CHEMED CORP12 citations74