Inventor · disambiguated record
Chih M. Hwa
Also filed as: HWA CHIH M · HWA CHIH MING
31 granted patents·988 citations·filing 1973–1995
98Inventor score
Top patents by PatentIndex Score
31 records- 0196US4350606AComposition and method for inhibiting corrosionDEARBORN CHEMICALS CO·Filed 1980·Granted Sep 21, 1982·69 cites·24 claims
- 0295US4098720ACorrosion inhibitionCHEMED CORP·Filed 1976·Granted Jul 4, 1978·60 cites·9 claims
- 0395US4066398ACorrosion inhibitionCHEMED CORP·Filed 1974·Granted Jan 3, 1978·53 cites·5 claims
- 0492US4649025AAnti-corrosion compositionGRACE W R & CO·Filed 1985·Granted Mar 10, 1987·55 cites·11 claims
- 0592US4067690ABoiler water treatmentCHEMED CORP·Filed 1977·Granted Jan 10, 1978·67 cites·6 claims
- 0691US5244600AMethod of scavenging oxygen in aqueous systemsGRACE W R & CO·Filed 1992·Granted Sep 14, 1993·46 cites·5 claims
- 0791US4134959AAzole-phosphate corrosion inhibiting composition and methodCHEMED CORP·Filed 1977·Granted Jan 16, 1979·50 cites·1 claims
- 0890US4977292A4-phosphonomethyl-2-hydroxy-2-oxo-1,4,2-oxazaphosphorinane N-oxide and water-soluble salts thereofGRACE W R & CO·Filed 1989·Granted Dec 11, 1990·44 cites·2 claims
- 0988US5019343AControl of corrosion in aqueous systems using certain phosphonomethyl aminesGRACE W R & CO·Filed 1989·Granted May 28, 1991·63 cites·9 claims
- 1088US4255259AScale inhibitionCHEMED CORP·Filed 1979·Granted Mar 10, 1981·49 cites·9 claims
- 1186US4973744AEthoxylated N,N-bis-phosphonomethyl 2-(hydroxy)ethylamine N-oxides and water-soluble salts thereofGRACE W R & CO·Filed 1989·Granted Nov 27, 1990·24 cites·3 claims
- 1284US4048066AMethod of inhibiting scaleCHEMED CORP·Filed 1976·Granted Sep 13, 1977·41 cites·9 claims
- 1383US5176849AComposition and method for scavenging oxygenGRACE W R & CO·Filed 1992·Granted Jan 5, 1993·33 cites·10 claims
- 1483US4101441AComposition and method of inhibiting corrosionCHEMED CORP·Filed 1976·Granted Jul 18, 1978·37 cites·4 claims
- 1583US3959167AMethod and composition of inhibiting scaleCHEMED CORP·Filed 1973·Granted May 25, 1976·23 cites·12 claims
- 1680US4847001AControl of corrosion in aqueous systemsGRACE W R & CO·Filed 1987·Granted Jul 11, 1989·25 cites·32 claims
- 1777US5051532AN,N-bis-phosphonomethyl taurine N-oxide and water-soluble salts thereofGRACE W R & CO·Filed 1989·Granted Sep 24, 1991·12 cites·2 claims
- 1876US4306991AScale inhibitionCHEMED CORP·Filed 1980·Granted Dec 22, 1981·33 cites·8 claims
- 1975US4631131AMethod for inhibiting scaleGRACE W R & CO·Filed 1985·Granted Dec 23, 1986·37 cites·7 claims
- 2070US5069798AControl of scale in aqueous systems using certain phosphonomethyl aminesGRACE W R & CO·Filed 1989·Granted Dec 3, 1991·29 cites·1 claims
- 2167US4600524AComposition and method for inhibiting scaleGRACE W R & CO·Filed 1983·Granted Jul 15, 1986·25 cites·6 claims
- 2258US4190421AFireside treating compositionsCHEMED CORP·Filed 1978·Granted Feb 26, 1980·12 cites·2 claims
- 2357US4581145AComposition and method for inhibiting scaleDEARBORN CHEMICALS CO·Filed 1985·Granted Apr 8, 1986·21 cites·2 claims
- 2455US4980128AControl of corrosion in aqueous systemsGRACE W R & CO·Filed 1987·Granted Dec 25, 1990·19 cites·32 claims
- 2553US5183574AMethod of dispersing ironGRACE W R & CO·Filed 1991·Granted Feb 2, 1993·18 cites·6 claims
- 2643US5587109AMethod for inhibition of oxygen corrosion in aqueous systems by the use of a tannin activated oxygen scavengerGRACE W R & CO·Filed 1995·Granted Dec 24, 1996·10 cites·14 claims
- 2741US5096595AControl of scale in aqueous systems using certain phosphonomethyl amine oxidesGRACE W R & CO·Filed 1991·Granted Mar 17, 1992·10 cites·7 claims
- 2839US5167866AControl of corrosion in aqueous systems using certain phosphonomethyl amine oxidesGRACE W R & CO·Filed 1989·Granted Dec 1, 1992·8 cites·11 claims
- 2936US5830383AMethod for inhibition of oxygen corrosion in aqueous systems by the use of a tannin activated oxygen scavengerBETZDEARBORN INC·Filed 1995·Granted Nov 3, 1998·6 cites·8 claims
- 3036US4680125AMethod of inhibiting the deposition of scale in an aqueous systemGRACE W R & CO·Filed 1986·Granted Jul 14, 1987·6 cites·25 claims
- 3132US4609483AScale inhibiting compositionGRACE W R & CO·Filed 1985·Granted Sep 2, 1986·3 cites·9 claims
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