Patents by Inventor Paul Wojtkowski

Paul Wojtkowski has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Thio-.beta.-lactam cephalosporins
    Patent number: 4039537
    Abstract: Thio-.beta.-lactam cephalosporins of the general formula ##STR1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, trihaloethyl, alkali metal or alkaline earth metal; R.sub.1 is hydrogen, lower alkyl, cycloalkyl, phenyl, phenoxy, phenyl-lower alkyl or certain heterocyclic groups; R.sub.2 is hydrogen, amino, carboxy, hydroxy or ureido; and X is hydrogen, hydroxy, lower alkylthio, lower alkylthiadiazolyl, lower alkyltetrazolyl or lower alkanoyloxy, are useful as antimicrobial agents.
    Type: Grant
    Filed: October 22, 1976
    Date of Patent: August 2, 1977
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Christopher M. Cimarusti, Paul Wojtkowski, Joseph E. Dolfini
  • Thio-.beta.-lactam cephalosporins
    Patent number: 4018760
    Abstract: Thio-.beta.-lactam cephalosporins of the general formula ##STR1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, trihaloethyl, alkali metal or alkaline earth metal; R.sub.1 is hydrogen, lower alkyl, cycloalkyl, phenyl, phenoxy, phenyl-lower alkyl or certain heterocyclic groups; R.sub.2 is hydrogen, amino, carboxy, hydroxy or ureido; and X is hydrogen, hydroxy, lower alkylthio, lower alkylthiadiazolyl, lower alkyltetrazolyl or lower alkanoyloxy, are useful as antimicrobial agents.
    Type: Grant
    Filed: February 20, 1976
    Date of Patent: April 19, 1977
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Christopher M. Cimarusti, Paul Wojtkowski, Joseph E. Dolfini
  • Thio-.beta.-lactam cephalosporins
    Patent number: 4018761
    Abstract: New intermediates of the formula ##STR1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, trihaloethyl, alkali metal or alkaline earth metal and X is lower alkylthiadiazolylthio or lower alkyltetrazolylthio are useful for the production of antimicrobially active acyl derivatives thereof.
    Type: Grant
    Filed: February 20, 1976
    Date of Patent: April 19, 1977
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Christopher M. Cimarusti, Paul Wojtkowski, Joseph E. Dolfini
  • Thio-.beta.-lactam penicillins
    Patent number: 3971776
    Abstract: Thio-.beta.-lactam penicillins of the general formula ##EQU1## wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, trihaloethyl, alkali metal or alkaline earth metal; R.sub.1 is hydrogen, lower alkyl, cycloalkyl, phenyl, lower alkoxyphenyl, phenoxy, phenyl-lower alkyl or certain heterocyclic groups; R.sub.2 is hydrogen, amino, carboxy or ureido; and n is 0 or 1; are useful as antimicrobial agents.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: July 27, 1976
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Christopher M. Cimarusti, Paul Wojtkowski, Joseph E. Dolfini
  • Thio-.beta.-lactam cephalosporins
    Patent number: 3971780
    Abstract: Thio-.beta.-lactam cephalosporins of the general formula ##SPC1##Wherein R is hydrogen, lower alkyl, phenyl-lower alkyl, trihaloethyl, alkali metal or alkaline earth metal; R.sub.1 is hydrogen, lower alkyl, cycloalkyl, phenyl, phenoxy, phenyl-lower alkyl or certain heterocyclic groups; R.sub.2 is hydrogen, amino, carboxy, hydroxy or ureido; and X is hydrogen, hydroxy, lower alkylthio, lower alkylthiadiazolyl, lower alkyltetrazolyl or lower alkanoyloxy, are useful as antimicrobial agents.
    Type: Grant
    Filed: February 19, 1975
    Date of Patent: July 27, 1976
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Christopher M. Cimarusti, Paul Wojtkowski, Joseph E. Dolfini