Inventor · disambiguated record
Vidyanatha A. Prasad
Also filed as: PRASAD VIDYANATHA A
37 granted patents·1 pending application·156 citations·filing 1977–2003
97Inventor score
Top patents by PatentIndex Score
38 records- 0176US5523449AProcess for preparing phosphorodichlorido-dithioates by reacting alkylmercaptans with phosphorus trichloride in the presence of sulfurBAYER AG·Filed 1995·Granted Jun 4, 1996·23 cites·8 claims
- 0275US6545172B1Processes for the production of methyl dithiocarbazinateBAYER AG·Filed 2002·Granted Apr 8, 2003·7 cites·26 claims
- 0364US6437189B1Synthesis of sulfoxides via selective oxidation of sulfides with a perborate or a percarbonateBAYER AG·Filed 1997·Granted Aug 20, 2002·9 cites·23 claims
- 0463US6127566AProcess for the synthesis of O,O-dimethyl phosphoroamidothioateBAYER AG·Filed 1998·Granted Oct 3, 2000·11 cites·19 claims
- 0561US6147222AProcess for the manufacture of sulfonylaminocarbonyl triazolinones and salts thereof under pH controlled conditionsBAYER AG·Filed 1999·Granted Nov 14, 2000·8 cites·14 claims
- 0660US6160125AProcess for the manufacture of sulfonylaminocarbonyl triazolinones in the presence of xylene as solventBAYER AG·Filed 1999·Granted Dec 12, 2000·7 cites·5 claims
- 0759US5440038AProcess for the purification of substituted 4-amino-1,2,4-triazine-5-onesMILES INC·Filed 1993·Granted Aug 8, 1995·6 cites·10 claims
- 0855US6147221AProcess for the manufacture of sulfonylaminocarbonyl triazolinones and salts thereofBAYER AG·Filed 1999·Granted Nov 14, 2000·6 cites·14 claims
- 0954US5464600AAmine catalyzed reaction in the production of thiophosphoryl chlorideBAYER AG·Filed 1994·Granted Nov 7, 1995·11 cites·15 claims
- 1053US5965737AApproach to the conversion of 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole (TDA) to 2-(methylsulfonyl)-5-(trifluoromethyl)-1,3,4-thiadiazole (TDA sulfone)BAYER AG·Filed 1999·Granted Oct 12, 1999·5 cites·14 claims
- 1152US5922404AProcess for producing dimethyl (2,2,2-trichloro-1-hydroxyethyl)-phosphonate and granular formulations thereofBAYER AG·Filed 1997·Granted Jul 13, 1999·9 cites·17 claims
- 1252US5808153AConversion of N-(4-fluorophenyl)-2-hydroxy-N-(1-methylethyl) acetamide acetate to N-4-fluorophenyl)-2-hydroxy-N-(1-methylethyl) acetamideFiled 1997·Granted Sep 15, 1998·4 cites·21 claims
- 1350US6251350B1Process for the manufacture of thiophosphoryl chlorideBAYER AG·Filed 1999·Granted Jun 26, 2001·11 cites·12 claims
- 1450US5898074AProcess for preparing 2-(methylthio)-5-(trifluoromethyl) -1,3,4-thiadiazole using methyldithiocarbazinate and a molar excess of trifluoroacetic acid with recovery of trifluoroacetic acidBAYER AG·Filed 1997·Granted Apr 27, 1999·4 cites·30 claims
- 1549US5792872AProcess for producing N-(4-fluorophenyl)-N-(1-methylethyl)-2- (5-trifluoromethyl-1,3,4-thiadiazol-2-yl)oxy!acetamideBAYER AG·Filed 1997·Granted Aug 11, 1998·4 cites·10 claims
- 1646US6031108AProcess for the preparation of 2-(methylsulfonyl)-5-(trifluoromethyl)-1,3,4-thiadiazole (TDA sulfone)BAYER AG·Filed 1998·Granted Feb 29, 2000·3 cites·22 claims
- 1746US5856499ASynthesis of 2-(methysulfonyl)-5-(trifluoro-methyl)-,3,4-thiadiazole via oxidation of 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole with glacial acetic acidBAYER AG·Filed 1997·Granted Jan 5, 1999·3 cites·10 claims
- 1846US5852202AProcess for isolating N-(4-fluorophenyl)-N-(1-methylethyl)-2- (5-trifluoromethyl)-1,3,4-thiadiazol-2-yl)oxy!acetamideBAYER AG·Filed 1997·Granted Dec 22, 1998·5 cites·16 claims
- 1946US5808152ASynthesis of N-(4-fluorophenyl)-2-hydroxy-N-(1-methylethyl)acetamide using sodium formateBAYER AG·Filed 1997·Granted Sep 15, 1998·3 cites·29 claims
- 2046US5466852AProcess for the production of S,S,S-tributylphosphorotrithioateBAYER AG·Filed 1994·Granted Nov 14, 1995·3 cites·8 claims
- 2142US6025514AProcess for preparing methyl dithiocarbazinate by reacting methyl bromide with the reaction product of carbon disulfide, hydrazine and an adjunct baseBAYER AG·Filed 1998·Granted Feb 15, 2000·2 cites·5 claims
- 2241US6075157APurification of O,S-dimethyl phosphoramidothioateBAYER AG·Filed 1998·Granted Jun 13, 2000·2 cites·8 claims
- 2341US5877339AProcess for preparing methyl dithiocarbazinate by reacting methyl bromide with the reaction product of carbon disulfide and hydrazine in an aqueous mediumBAYER AG·Filed 1996·Granted Mar 2, 1999·2 cites·9 claims
- 2438US4970320APreparation of phenoxy-triazolyl-pinacol-onesMOBAY CORP·Filed 1990·Granted Nov 13, 1990·1 cites·18 claims
- 2537US6197971B1Process for the manufacture of substituted triazolinonesBAYER AG·Filed 1999·Granted Mar 6, 2001·1 cites·27 claims
- 2637US5895818AProcess for making N-(4-fluorophenyl)-N-(1-methylethyl)-2- (5-trifuloromethyl)-1,3,4-thiadiazol-2-yl)oxy!acetamide using an aprotic, aromatic solventBAYER AG·Filed 1997·Granted Apr 20, 1999·1 cites·22 claims
- 2736US6034245AProcess for making 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole using methyldithiocarbazinate with trifluoroacetic acid with selective removal of 2,5-bis(methylthio)-1,3,4-thiadiazoleBAYER AG·Filed 1998·Granted Mar 7, 2000·2 cites·17 claims
- 2836US5189195AProcess for producing stable, low odor S,S,S-tributylphosphorotrithioateMILES INC·Filed 1991·Granted Feb 23, 1993·2 cites·8 claims
- 2934US6005114AProcess for making 2-(methylthio)-5(trifluoromethyl)-1,3,4,-thiadiazole using methyldithiocarbazinate with trifluoroacetic acid with selective removal of 2,5-bis(methylthio)-1,3,4-thiadiazoleBAYER AG·Filed 1997·Granted Dec 21, 1999·1 cites·15 claims
- 3032US5922896AProcess for making O,S-dimethyl phosphoramidothioateBAYER AG·Filed 1997·Granted Jul 13, 1999·0 cites·8 claims
- 3132US5527939AAmine catalyzed reaction of alkyl mercaptans with thiophosphoryl chlorideBAYER AG·Filed 1994·Granted Jun 18, 1996·0 cites·8 claims
- 3231US7049456B2Method for preparing O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioatesBAYER CROPSCIENCE LP·Filed 2003·Granted May 23, 2006·0 cites·21 claims
- 3331US5831112AProcess for producing stable, low odor S,S,S-tributylphosphorothrithioteBAYER AG·Filed 1997·Granted Nov 3, 1998·0 cites·4 claims
- 3430US4154780APreparation of dithiophosphoric acid diester-halidesBAYER AG·Filed 1977·Granted May 15, 1979·0 cites·13 claims
- 3529US2004167348A1Methods for purifying O,O-dialkyl S-[2-(alkylthio)alkyl] phosphorodithioatesFiled 2003·Application pending·0 cites
- 3627US5543543AProcess for preparing phosphorodichloridodithioates by reacting alkyl mercaptans with PCI3 PSCI3 and sulfurBAYER AG·Filed 1995·Granted Aug 6, 1996·0 cites·9 claims
- 3725US5905157AProcess for producing 2-(methylthio)-5-(trifluoromethyl)-1,3,4-thiadiazole using methyldithiocarbazinate and trifluoroacetic acidBAYER AG·Filed 1997·Granted May 18, 1999·0 cites·15 claims
- 3825US4228279AProduction of O,O-dialkyl-S-(benzazimidomethyl)-thiolphosphoric acid estersMOBAY CHEMICAL CORP·Filed 1979·Granted Oct 14, 1980·0 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →