Inventor
HEYMER GERO
59 patents
Patents
50 patentsUS3943231AMar 9, 1976
Process for making condensed aluminum phosphates
HOECHST AG54 citations96
US4294808AOct 13, 1981
Production of anticorrosive pigments containing phosphorus
HOECHST AG54 citations95
US4639331AJan 27, 1987
Process for making pulverulent ammonium polyphosphates stable to hydrolysis
HOECHST AG41 citations92
US4601887AJul 22, 1986
Apparatus for improving the degree of graphitization of carbon black, and its use
HOECHST AG43 citations91
US4452768AJun 5, 1984
Process for removing heavy metal ions from wet-processed phosphoric acid
HOECHST AG24 citations82
US4163760AAug 7, 1979
Continuous production of organic phosphines
HOECHST AG24 citations81
US4396586AAug 2, 1983
Process for making long-chain ammonium polyphosphate
HOECHST AG20 citations80
US3978195AAug 31, 1976
Process for the production of substantially water-insoluble linear ammonium polyphosphates
HOECHST AG23 citations78
US4466948AAug 21, 1984
Process for removing heavy metal ions and arsenic from wet-processed phosphoric acid
HOECHST AG7 citations74
US4457848AJul 3, 1984
Process for after-treating extraction residues originating from the decontamination of phosphoric acid
HOECHST AG8 citations74
US4346065AAug 24, 1982
Process for the manufacture of finely dispersed sparingly soluble salts of oxyacids of phosphorus
HOECHST AG15 citations73
US4294621AOct 13, 1981
Production of an anticorrosive pigment on phosphate basis
HOECHST AG15 citations73
US4200620AApr 29, 1980
Decontamination of wet-processed phosphoric acid
HOECHST AG10 citations73
US4530769AJul 23, 1985
Process for separating carbon black from an aqueous suspension
HOECHST AG9 citations72
US4392962AJul 12, 1983
Process for separating metals from aqueous solutions
HOECHST AG8 citations72
US4273752AJun 16, 1981
Process for making red phosphorus
HOECHST AG6 citations72
US4596703AJun 24, 1986
Process for purifying wet-processed phosphoric acid
HOECHST AG11 citations69
US4134964AJan 16, 1979
Process and apparatus for purifying wet-processed phosphoric acid
HOECHST AG8 citations69
US4042324AAug 16, 1977
Process for inhibiting the corrosions and deposition of boiler scale in water-conveying systems
HOECHST AG18 citations69
US4678650AJul 7, 1987
Process for making an alkali phosphate solution
HOECHST AG5 citations63
US4668492AMay 26, 1987
Process for dearsenifying phosphoric acid solutions
HOECHST AG4 citations63
US4539192ASep 3, 1985
Process for removing fluorine and organic compounds from prepurified wet processed phosphoric acid
HOECHST AG6 citations63
US4923691AMay 8, 1990
Aluminum nitride powder and a process for the preparation thereof
HOECHST AG4 citations62
US4705529ANov 10, 1987
Process for reducing the reactivity and improving the flow behavior of phosphorus pentoxide
HOECHST AG2 citations62
US4482527ANov 13, 1984
Process for removing nitrogen dioxide from off-gas
HOECHST AG3 citations62
US4418043ANov 29, 1983
Process for separating metals from aqueous solutions
HOECHST AG2 citations62
US4320108AMar 16, 1982
Process for the removal of metals from carbon black
HOECHST AG2 citations62
US4279878AJul 21, 1981
Process for freeing phosphoric acid from organic contaminants
HOECHST AG5 citations62
US4222994ASep 16, 1980
Solvent extraction purification of wet-processed phosphoric acid
HOECHST AG6 citations62
US4150058AApr 17, 1979
Production of alkyl phosphines
HOECHST AG5 citations62
US4136155AJan 23, 1979
Production of phosphine
HOECHST AG2 citations62
US4134962AJan 16, 1979
Production of pure alkali metal phosphate solutions from wet-processed phosphoric acids
HOECHST AG5 citations62
US4073810AFeb 14, 1978
Production of organophosphines
HOECHST AG5 citations62
US3953581AApr 27, 1976
Purification of wet-processed phosphoric acid using anhydrous solvents
HOECHST AG6 citations62
US4906445AMar 6, 1990
Continuous process for complete removal or organic impurities from and complete decolorization of prepurified wet-process phosphoric acid
HOECHST AG2 citations61
US4517163AMay 14, 1985
Process for making titanium dioxide concentrates
HOECHST AG5 citations61
US4399114AAug 16, 1983
Process for the dearsenification of polyphosphoric acid
HOECHST AG2 citations61
US4355010AOct 19, 1982
Process for removing phosphorus in vapor form and phosphanes from gas mixtures
HOECHST AG6 citations61
US4330504AMay 18, 1982
Apparatus for making red phosphorus
HOECHST AG2 citations61
US4278647AJul 14, 1981
Production of phosphorous acid
HOECHST AG3 citations61
US4258022AMar 24, 1981
Continuous production of phosphine
HOECHST AG4 citations61
US4143121AMar 6, 1979
Continuous production of pure phosphine
HOECHST AG4 citations61
US4128620ADec 5, 1978
Production of phosphine
HOECHST AG2 citations61
US3931294AJan 6, 1976
Production of 2-phenyl-ethylene phosphonic acid
HOECHST AG3 citations61
US4385041AMay 24, 1983
Process for making aqueous alkali metal phosphate solutions
HOECHST AG2 citations60
US4156697AMay 29, 1979
Production of alkylphosphines
HOECHST AG3 citations60
US3991164ANov 9, 1976
Process for the dearsenication of polyphosphoric acid
HOECHST AG5 citations60
US3956462AMay 11, 1976
Process utilizing waste material consisting substantially of phosphorous acid
HOECHST AG3 citations60
US4525333AJun 25, 1985
Process for separating gallium and indium from aqueous solutions
HOECHST AG3 citations58
US4394358AJul 19, 1983
Production of granular alkali metal diphosphates or triphosphates
HOECHST AG5 citations58
Showing the top 50 of 59 patents by PatentIndex Score.