Inventor · disambiguated record
William H. Koster
Also filed as: KOSTER WILLIAM H · KOSTER WILLIAM HENRY
28 granted patents·313 citations·filing 1973–1995
96Inventor score
Files withSQUIBB & SONS INC28
Top patents by PatentIndex Score
28 records- 0198US4576749A3-Acylamino-1-carboxymethylaminocarbonyl-2-azetidinonesSQUIBB & SONS INC·Filed 1984·Granted Mar 18, 1986·71 cites·32 claims
- 0297US4775670A2-oxo-1-azetidinesulfonic acid saltsSQUIBB & SONS INC·Filed 1981·Granted Oct 4, 1988·61 cites·48 claims
- 0389US4743685A2-oxo-1-[[(substituted sulfonyl)amino]carbonyl]azetidinesSQUIBB & SONS INC·Filed 1986·Granted May 10, 1988·28 cites·26 claims
- 0484US4237128A7-[2-(2-Amino-4-thiazolyl)-2-[(1-carboxy-1,1-dialkyl)alkoxyimino]acetamido]cephem sulfoxidesSQUIBB & SONS INC·Filed 1979·Granted Dec 2, 1980·19 cites·5 claims
- 0574US4680388AO-sulfated spiro β-lactam hydroxamic acidsSQUIBB & SONS INC·Filed 1986·Granted Jul 14, 1987·10 cites·6 claims
- 0674US4203992Aβ-Bromopenicillanic acid sulfoneSQUIBB & SONS INC·Filed 1978·Granted May 20, 1980·11 cites·6 claims
- 0773US4062842AMethod for preparing 7-substituted cephalosporins and 6-substituted penicillins by replacement of sulfur-containing groupsSQUIBB & SONS INC·Filed 1976·Granted Dec 13, 1977·7 cites·23 claims
- 0872US4638060AO-sulfated spiro β-lactam hydroxamic acidsSQUIBB & SONS INC·Filed 1985·Granted Jan 20, 1987·9 cites·6 claims
- 0972US4478749A2-Oxo-1-(substituted phosphorous)azetidinesSQUIBB & SONS INC·Filed 1982·Granted Oct 23, 1984·9 cites·24 claims
- 1070US4638061A[3S(Z)]-2-[[[1-(2-amino-4-thiazolyl)-2-[[2,2-dimethyl-4-oxo-1-(sulfooxy)-3-azetidinyl]amino]-2-oxoethylidene]-amino]oxy] acetic acid and intermediateSQUIBB & SONS INC·Filed 1985·Granted Jan 20, 1987·8 cites·2 claims
- 1166US5290929AHeteroaryl derivatives of monocyclic beta-lactam antibioticsSQUIBB & SONS INC·Filed 1992·Granted Mar 1, 1994·17 cites·19 claims
- 1265US4529698AProcess for preparing a 2-oxo-1-azetidinesulfonic acid saltSQUIBB & SONS INC·Filed 1984·Granted Jul 16, 1985·20 cites·1 claims
- 1363US4071682A7-α substituted imino 7-β substituted thio cephalosporin derivativesSQUIBB & SONS INC·Filed 1976·Granted Jan 31, 1978·4 cites·9 claims
- 1461US4751220ACrystalline salts of [3S(Z)]-2[[[1-(2-amino-4-thiazolyl)-2-[[2,2-dimethyl-4-oxo-1-(sulfooxy)-3-azetidinyl]amino]-2-oxoethylidene]-amino]oxy]acetic acidSQUIBB & SONS INC·Filed 1986·Granted Jun 14, 1988·12 cites·3 claims
- 1557US3985746A7-(α-Cyanomethylthio)acetamido-3-cephem carboxylatesSQUIBB & SONS INC·Filed 1975·Granted Oct 12, 1976·3 cites·14 claims
- 1654US4443374AProcess for preparing (3S)-3-[[(2-amino-4-thiazolyl)[(1-carboxy-1-methylethoxy)imino]-acetyl]amino]-2-oxo-1-azetidinesulfonic acid, and 4-substituted derivativesSQUIBB & SONS INC·Filed 1982·Granted Apr 17, 1984·3 cites·4 claims
- 1751US4681937A3-acylamino-2-oxo-1-azetidinyl esters of phosphonic acids, phosphoric acid and phosphoric acid estersSQUIBB & SONS INC·Filed 1982·Granted Jul 21, 1987·3 cites·22 claims
- 1851US3968109AProduction of 2-(thio substituted)cephalosporin sulfoxides and 2-(thio substituted)cephalosporinsSQUIBB & SONS INC·Filed 1973·Granted Jul 6, 1976·3 cites·19 claims
- 1947US4654426AAcetylenic antibioticsSQUIBB & SONS INC·Filed 1986·Granted Mar 31, 1987·2 cites·16 claims
- 2044US4588828AAcetylenic antibioticsSQUIBB & SONS INC·Filed 1984·Granted May 13, 1986·1 cites·12 claims
- 2144US4574153A8-Oxo-2-oxa-1-azabicyclo(4.2.0)octane-3-carboxylic acidsSQUIBB & SONS INC·Filed 1985·Granted Mar 4, 1986·4 cites·17 claims
- 2241US4548751A(2-Oxo-1-azetidinyloxy)-2-propenoic acidSQUIBB & SONS INC·Filed 1983·Granted Oct 22, 1985·2 cites·9 claims
- 2340US4587051ADesulfonation process for preparing 2-azetidinonesSQUIBB & SONS INC·Filed 1984·Granted May 6, 1986·1 cites·20 claims
- 2439US4723002A1-(substituted phosphorous)-azetidinone antibacterialsSQUIBB & SONS INC·Filed 1986·Granted Feb 2, 1988·2 cites·16 claims
- 2538US4670554A((3-Acylamino-2-oxo-1-azetidinyl)oxy)methyl)phosphinic acidsSQUIBB & SONS INC·Filed 1983·Granted Jun 2, 1987·1 cites·14 claims
- 2635US5705645AHereroaryl derivatives of monocyclic beta-lactam antibioticsSQUIBB & SONS INC·Filed 1995·Granted Jan 6, 1998·1 cites·11 claims
- 2732US4129731AProcess for converting 3-methylene cephalosporins to 3-heterothiomethyl cephalosporinsSQUIBB & SONS INC·Filed 1976·Granted Dec 12, 1978·1 cites·10 claims
- 2830US5420277AIntermediates for the preparation of heteroaryl derivatives of monocyclic beta-lactam antiobioticsSQUIBB & SONS INC·Filed 1993·Granted May 30, 1995·0 cites·7 claims
Join the waitlist — get patent alerts
Get an alert when William H. Koster files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →