Patents by Inventor Sidney E. Callander

Sidney E. Callander 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).

  • Chemical process
    Patent number: 5202495
    Abstract: A process for the preparation of the compound of formula (I), 3-(6'methoxy-2'-naphthylmethyl)-2,4-pentanedione, ##STR1## comprises the calalytic hydrogenation of a compound of formula (II): ##STR2##
    Type: Grant
    Filed: October 10, 1990
    Date of Patent: April 13, 1993
    Inventor: Sidney E. Callander
  • Process for preparing 4-(6-methoxy-2'-naphthyl)butane-2-one
    Patent number: 5132466
    Abstract: A process for the preparation of a compound of formula (I): ##STR1## in which X and Y are identical and represent halogen, or X is halogen and Y is hydrogen, which comprises halogenating 2-methyl-6-methoxynaphthalene, of formula (II): ##STR2## in the presence of a free radical initiator.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: July 21, 1992
    Assignee: Beecham Group p.l.c.
    Inventors: John R. M. Dales, Sidney E. Callander
  • Chemical process for halogenating 2-methyl-6-methoxynaphthalene
    Patent number: 5068458
    Abstract: A process for the preparation of a compound of formula (I): ##STR1## in which X and Y are identical and represent halogen, or X is halogen and Y is hydrogen, which comprises halogenating 2-methyl-6-methoxynaphthalene, of formula (II): ##STR2## in the presence of a free radical initiator.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: November 26, 1991
    Assignee: Beecham Group p.l.c.
    Inventors: John R. M. Dales, Sidney E. Callander
  • Penicillin salt
    Patent number: 4481209
    Abstract: Ampicillin phthalidyl ester naphthalene-2-sulphonate, its preparation, and its use in pharmaceutical compositions to treat infections.
    Type: Grant
    Filed: November 7, 1980
    Date of Patent: November 6, 1984
    Assignee: Beecham Group Limited
    Inventors: Kenneth Utting, Karrar A. Khan, Sidney E. Callander
  • Penicillin synthesis
    Patent number: 4072677
    Abstract: Process of preparing phthalidyl ampicillin or other orally absorbable penicillin ester by esterification of the parent penicillin in a two-phase system using a phase transfer catalyst which increases the solubility of a salt form of the penicillin in the water-immiscible solvent used in the process. The phase transfer catalysts are quaternary ammonium salts or tertiary amines of non-low molecular weight, or crown ethers.
    Type: Grant
    Filed: November 30, 1976
    Date of Patent: February 7, 1978
    Assignee: Beecham Group Limited
    Inventor: Sidney E. Callander