Patents by Inventor Allan William Timms

Allan William Timms 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).

  • Process for the production of substituted thioxanthones
    Patent number: 6960668
    Abstract: A one-step process for the preparation of a substituted thioxanthone, such as carboxymethoxythioxanthone, in high yields and as a single isomer. The substituted aryl compound is reacted with mercaptobenzoic acid or dithiobisbenzoic acid in the presence of sulphuric acid.
    Type: Grant
    Filed: July 3, 2003
    Date of Patent: November 1, 2005
    Assignee: Great Lakes (UK) Limited
    Inventors: Allan William Timms, William Arthur Green
  • Process for the production of substituted thioxanthones
    Publication number: 20040059133
    Abstract: A one-step process for the preparation of a substituted thioxanthone, such as carboxymethoxythioxanthone, in high yields and as a single isomer. The substituted aryl compound is reacted with mercaptobenzoic acid or dithiobisbenzoic acid in the presence of sulphuric acid.
    Type: Application
    Filed: July 3, 2003
    Publication date: March 25, 2004
    Applicant: Great Lakes (UK) Limited
    Inventors: Allan William Timms, William Arthur Green
  • Preparation of cyclopropylethyne and intermediates for preparation of cyclopropylethyne
    Patent number: 6528693
    Abstract: 1-chloropropylethyne is prepared by dehydrochlorination with a base of 1-chloro-1-cyclopropylethene, which is itself prepared by treating 1-cyclopropylethanone with dichlorotriarylphosphorane or dichlorotrialkylphosphorane in the presence of a base.
    Type: Grant
    Filed: April 5, 2001
    Date of Patent: March 4, 2003
    Assignee: Great Lakes (UK) Limited
    Inventors: Robert Gandy, Peter John Cremins, Allan Williams Timms
  • Preparation of substituted phosphide salts
    Patent number: 6215026
    Abstract: Substituted sodium salts of phosphides are prepared by reacting a triarylphosphine with sodium in an aliphatic amine or diamine as a solvent or co-solvent. The resultant phosphides may be further treated with appropriate halides to produce unsymmetrical phosphines.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: April 10, 2001
    Assignee: Great Lakes (UK) Limited
    Inventors: Robert Gandy, Peter John Cremins, Allan William Timms