Inventor

DENZEL THEODOR

55 patents

Patents

50 patents

US4587047AMay 6, 1986

Process and intermediates for beta-lactams having aminothiazole(iminooxyacetic acid)acetic acid sidechains

SQUIBB & SONS INC16 citations74

US4670553AJun 2, 1987

2-oxo-1-(aminocarbonylaminosulfonyl-aminocarbonyl)azetidines

SQUIBB & SONS INC13 citations74

US4271157AJun 2, 1981

Imidazole derivatives of 7-[(2-amino-4-thiazolyl)-oximino] cephalosporins

SQUIBB & SONS INC9 citations74

US4252802AFeb 24, 1981

Hydroxamic acid derivatives of 7-[(2-amino-4-thiazolyl)-oximino] cephalosporins

SQUIBB & SONS INC12 citations74

US4223142ASep 16, 1980

Amino derivatives of pyrido(2,3-d)pyridazine carboxylic acids and esters

SQUIBB & SONS INC13 citations74

US4109087AAug 22, 1978

1,4- AND 4,10-Dihydro-4-oxo-pyrimido[1,2-a]benzimidazole-3-carboxylic acid amides

SQUIBB & SONS INC7 citations74

US4091219AMay 23, 1978

Amino derivatives of 1,2,3,4-tetrahydro-2-oxopyrido[2,3-b]-pyrazine carboxylic acids and esters

SQUIBB & SONS INC9 citations74

US4072679AFeb 7, 1978

1,4- AND 4,10-DIHYDRO-4-OXO-PYRIMIDO (1,2-A)-benzimidazole-3-carboxylic acids, esters and amides

SQUIBB & SONS INC5 citations74

US4070466AJan 24, 1978

4H-pyrazolo[1 ,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

SQUIBB & SONS INC7 citations74

US4066643AJan 3, 1978

Pyrazolo[1,5-a]pyrido[3,2-e]pyrimidine-7-carboxylic acid derivatives

SQUIBB & SONS INC14 citations74

US4022779AMay 10, 1977

Amino derivatives of pyrido(3,4-b)pyrazine carboxylic acids and esters

SQUIBB & SONS INC8 citations74

US4000277ADec 28, 1976

3,11-Dihydro- 6H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[4,3-d]pyrimidin-6-one and derivatives thereof

SQUIBB & SONS INC5 citations74

US3985757AOct 12, 1976

Pyrazolopyridine ketones

SQUIBB & SONS INC9 citations74

US3984412AOct 5, 1976

Amino derivatives of pyrido[2,3-b]pyrazine carboxylic acids and esters

SQUIBB & SONS INC11 citations74

US3953461AApr 27, 1976

Amino derivatives of thiazolo[5,4-b]pyridine-6-carboxylic acids and esters

SQUIBB & SONS INC10 citations74

US3933823AJan 20, 1976

Isoxazolopyridine ketone derivatives

SQUIBB & SONS INC15 citations74

US4012373AMar 15, 1977

Pyrazolo[3',4'-2,3]pyrido[4,5-e]b-benzo-1,5-diazepinones

SQUIBB & SONS INC12 citations73

US4734496AMar 29, 1988

4-amino derivatives of 2-oxo-1-azetidinesulfonic acid salts

SQUIBB & SONS INC3 citations63

US4501743AFeb 26, 1985

Iminothiazolyl ureido cephalosporins

SQUIBB & SONS INC3 citations63

US4499016AFeb 12, 1985

2-Oxo-1-[(acylamino)sulfonyl]azetidines

SQUIBB & SONS INC2 citations63

US4461767AJul 24, 1984

Iminothiazolyl ureido cephalosporins

SQUIBB & SONS INC4 citations63

US4233300ANov 11, 1980

8H-Pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine

SQUIBB & SONS INC6 citations63

US4128645ADec 5, 1978

4H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

SQUIBB & SONS INC1 citations63

US4127657ANov 28, 1978

4H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

SQUIBB & SONS INC1 citations63

US4127655ANov 28, 1978

8H-Pyrazolo[4',3':5,6]pyrido[3,4-e] [1,2,4]triazolo-[1,5-a]pyrimidines

SQUIBB & SONS INC3 citations63

US4110454AAug 29, 1978

8H-Pyrazolo[4',3':5,6]pyrido[3,4-e][1,2,4]triazolo-[1,5-a]pyrimidines

SQUIBB & SONS INC1 citations63

US4109091AAug 22, 1978

Derivatives of 1,4- and 4,10-dihydro-4-oxo-pyrimido[1,2-a]benzimidazole-3-carboxylic acid amides

SQUIBB & SONS INC3 citations63

US4088654AMay 9, 1978

Derivatives of imidazo(4,5-b)pyridines

SQUIBB & SONS INC3 citations63

US4077955AMar 7, 1978

Amino derivatives of 1,2,3,4-tetrahydro-2-oxopyrido[2,2-b]-pyrazine carboxylic acids and esters

SQUIBB & SONS INC4 citations63

US4078064AMar 7, 1978

8H-Pyrazolo[4',3':5,6]pyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidines

SQUIBB & SONS INC1 citations63

US4076712AFeb 28, 1978

Derivatives of pyrazolo[1,5-a]pyrido[2,3-d]pyrimidin-9(4H)-one

SQUIBB & SONS INC4 citations63

US4075210AFeb 21, 1978

Pyrazolo[1,5-a]pyrido[4,3-d]pyrimidin-9(4H)-one and derivatives thereof

SQUIBB & SONS INC2 citations63

US4072681AFeb 7, 1978

3,7-Dihydro- and 1,7-dihydro-4H-pyrazolo[4',3':5,6]pyrido[4,3-d]pyrimidin-4-ones

SQUIBB & SONS INC4 citations63

US4061632ADec 6, 1977

3,11-Dihydro-6H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]-pyrido[4,3-d]pyrimidin-6-one derivatives

SQUIBB & SONS INC3 citations63

US4048182ASep 13, 1977

Derivatives of imidazo [4,5-b]pyridines

SQUIBB & SONS INC4 citations63

US4038283AJul 26, 1977

4-Alkoxy or hydroxy derivatives of 2H-pyrazolo[3,4-b]pyridine-5-carboxylic acids and esters

SQUIBB & SONS INC2 citations63

US4038281AJul 26, 1977

Certain 2,7-dihydro-4H-pyrazolo[3,4-b]pyridine-5-ketones

SQUIBB & SONS INC4 citations63

US3983128ASep 28, 1976

Alcohol derivatives of pyrazolo[3,4-b]pyridines

SQUIBB & SONS INC2 citations63

US3971800AJul 27, 1976

Derivatives of 1H-triazolo[4,5-c]pyridine-7-carboxylic acids and esters

SQUIBB & SONS INC4 citations63

US3971801AJul 27, 1976

Derivatives of 1H-triazolo[4,5-c]pyridine-7-carboxylic acids and esters

SQUIBB & SONS INC4 citations63

US3987051AOct 19, 1976

Method for producing 1-unsubstituted pyrazolo[3,4-b]pyridine ketones

SQUIBB & SONS INC3 citations60

US4269836AMay 26, 1981

4H-Pyrazolo[4',3':5,6]pyrido[4,3-d][1,2,4]triazolo[3,2-b]-pyrimidin-5(8H)one and derivatives thereof

SQUIBB & SONS INC0 citations52

US4202899AMay 13, 1980

8H-Pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine

SQUIBB & SONS INC0 citations52

Showing the top 50 of 55 patents by PatentIndex Score.

DENZEL THEODOR

Patents

2-oxo-1-[[(substituted sulfonyl)amino]-carbonyl]azetidines

Derivatives of imidazo(4,5-b)pyridines

Derivatives of pyrazolo[1,5-a]pyrido[3,2-e]pyrimidine

Derivatives of pyrazolo [1,5-a]pyrido[3,4-e]pyrimidine

Amino derivatives of imidazo[4,5-b]pyridines

Amino derivatives of pyrazolopyridine carboxamides

Amino derivatives of pyrazolopyridine carboxamides

Process and intermediates for beta-lactams having aminothiazole(iminooxyacetic acid)acetic acid sidechains

2-oxo-1-(aminocarbonylaminosulfonyl-aminocarbonyl)azetidines

Imidazole derivatives of 7-[(2-amino-4-thiazolyl)-oximino] cephalosporins

Hydroxamic acid derivatives of 7-[(2-amino-4-thiazolyl)-oximino] cephalosporins

Amino derivatives of pyrido(2,3-d)pyridazine carboxylic acids and esters

1,4- AND 4,10-Dihydro-4-oxo-pyrimido[1,2-a]benzimidazole-3-carboxylic acid amides

Amino derivatives of 1,2,3,4-tetrahydro-2-oxopyrido[2,3-b]-pyrazine carboxylic acids and esters

1,4- AND 4,10-DIHYDRO-4-OXO-PYRIMIDO (1,2-A)-benzimidazole-3-carboxylic acids, esters and amides

4H-pyrazolo[1 ,5-a]pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

Pyrazolo[1,5-a]pyrido[3,2-e]pyrimidine-7-carboxylic acid derivatives

Amino derivatives of pyrido(3,4-b)pyrazine carboxylic acids and esters

3,11-Dihydro- 6H-pyrazolo[1,5-a]pyrazolo[4&#39;,3&#39;:5,6]pyrido[4,3-d]pyrimidin-6-one and derivatives thereof

Pyrazolopyridine ketones

Amino derivatives of pyrido[2,3-b]pyrazine carboxylic acids and esters

Amino derivatives of thiazolo[5,4-b]pyridine-6-carboxylic acids and esters

Isoxazolopyridine ketone derivatives

Pyrazolo[3&#39;,4&#39;-2,3]pyrido[4,5-e]b-benzo-1,5-diazepinones

4-amino derivatives of 2-oxo-1-azetidinesulfonic acid salts

Iminothiazolyl ureido cephalosporins

2-Oxo-1-[(acylamino)sulfonyl]azetidines

Iminothiazolyl ureido cephalosporins

8H-Pyrazolo[1,5-a]pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e]pyrimidine

4H-pyrazolo[1,5-a]pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

4H-pyrazolo[1,5-a]pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

8H-Pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e] [1,2,4]triazolo-[1,5-a]pyrimidines

8H-Pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e][1,2,4]triazolo-[1,5-a]pyrimidines

Derivatives of 1,4- and 4,10-dihydro-4-oxo-pyrimido[1,2-a]benzimidazole-3-carboxylic acid amides

Derivatives of imidazo(4,5-b)pyridines

Amino derivatives of 1,2,3,4-tetrahydro-2-oxopyrido[2,2-b]-pyrazine carboxylic acids and esters

8H-Pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidines

Derivatives of pyrazolo[1,5-a]pyrido[2,3-d]pyrimidin-9(4H)-one

Pyrazolo[1,5-a]pyrido[4,3-d]pyrimidin-9(4H)-one and derivatives thereof

3,7-Dihydro- and 1,7-dihydro-4H-pyrazolo[4&#39;,3&#39;:5,6]pyrido[4,3-d]pyrimidin-4-ones

3,11-Dihydro-6H-pyrazolo[1,5-a]pyrazolo[4&#39;,3&#39;:5,6]-pyrido[4,3-d]pyrimidin-6-one derivatives

Derivatives of imidazo [4,5-b]pyridines

4-Alkoxy or hydroxy derivatives of 2H-pyrazolo[3,4-b]pyridine-5-carboxylic acids and esters

Certain 2,7-dihydro-4H-pyrazolo[3,4-b]pyridine-5-ketones

Alcohol derivatives of pyrazolo[3,4-b]pyridines

Derivatives of 1H-triazolo[4,5-c]pyridine-7-carboxylic acids and esters

Derivatives of 1H-triazolo[4,5-c]pyridine-7-carboxylic acids and esters

Method for producing 1-unsubstituted pyrazolo[3,4-b]pyridine ketones

4H-Pyrazolo[4&#39;,3&#39;:5,6]pyrido[4,3-d][1,2,4]triazolo[3,2-b]-pyrimidin-5(8H)one and derivatives thereof

8H-Pyrazolo[1,5-a]pyrazolo[4&#39;,3&#39;:5,6]pyrido[3,4-e]pyrimidine

4H-pyrazolo[1 ,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

3,11-Dihydro- 6H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[4,3-d]pyrimidin-6-one and derivatives thereof

Pyrazolo[3',4'-2,3]pyrido[4,5-e]b-benzo-1,5-diazepinones

8H-Pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine

4H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

4H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidin-5(8H)one and derivatives thereof

8H-Pyrazolo[4',3':5,6]pyrido[3,4-e] [1,2,4]triazolo-[1,5-a]pyrimidines

8H-Pyrazolo[4',3':5,6]pyrido[3,4-e][1,2,4]triazolo-[1,5-a]pyrimidines

8H-Pyrazolo[4',3':5,6]pyrido[3,4-e][1,2,4]triazolo[1,5-a]pyrimidines

3,7-Dihydro- and 1,7-dihydro-4H-pyrazolo[4',3':5,6]pyrido[4,3-d]pyrimidin-4-ones

3,11-Dihydro-6H-pyrazolo[1,5-a]pyrazolo[4',3':5,6]-pyrido[4,3-d]pyrimidin-6-one derivatives

4H-Pyrazolo[4',3':5,6]pyrido[4,3-d][1,2,4]triazolo[3,2-b]-pyrimidin-5(8H)one and derivatives thereof

8H-Pyrazolo[1,5-a]pyrazolo[4',3':5,6]pyrido[3,4-e]pyrimidine