Patents by Inventor Alan G. Long

Alan G. Long 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 compounds
    Patent number: 4193917
    Abstract: Novel semisynthetic .beta.-lactam intermediates of use in the production of cephalosporins, penicillins and related .beta.-lactam antibiotic compounds are provided. The novel compounds are prepared from .beta.-lactams obtained by cleavage of the 1,2-sulphur-carbon bond of a penicillin 1-oxide (with subsequent internal or external trapping of the sulphur atom to leave a residual substituent as the .beta.-lactam nitrogen) by removal of the said residual substituent by an oxidative cleavage reaction.
    Type: Grant
    Filed: August 12, 1976
    Date of Patent: March 18, 1980
    Assignee: Glaxo Laboratories, Limited
    Inventors: Derek H. R. Barton, Alan G. Long, Brian E. Looker, Edward M. Wilson, William G. Elphinstone
  • Process for the preparation of 3-vinyl and substituted vinyl cephalosporins
    Patent number: 4110534
    Abstract: The invention is concerned with the preparation of .DELTA..sup.3 -4-carboxy cephalosporin antibiotics possessing a 3-vinyl group or substituted 3-vinyl group by means of phosphorous intermediates.
    Type: Grant
    Filed: April 21, 1976
    Date of Patent: August 29, 1978
    Assignee: Glaxo Laboratories Limited
    Inventors: John C. Clark, James Kennedy, Alan G. Long, Niall G. Weir