Patents by Inventor Thelma Watterson

Thelma Watterson 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).

  • Publication number: 20070104787
    Abstract: Disclosed herein are pharmaceutical compositions comprising carboxyalkylcellulose esters for sustained delivery of pharmaceutically active substances. The composition comprises: at least one pharmaceutically active agent, and at least one carboxyalkyl cellulose ester comprising an anhydroglucose repeat unit having the structure: wherein: R1-R6 are each independently selected from —OH, —OC(O)(alkyl), and —O(CH2)xC(O)OH, and pharmaceutically acceptable salts thereof, wherein x ranges from 1-3, a degree of substitution per anhydroglucose of —OH ranges from 0.1 to 0.7, a degree of substitution per anhydroglucose of —C(O)(alkyl) ranges from 0.1 to 2.7, and a degree of substitution per anhydroglucose of —O(CH2)xC(O)OH ranges from 0.2 to 0.75, and wherein in pharmaceutically acceptable media, the composition exhibits sustained release of the at least one pharmaceutically active agent.
    Type: Application
    Filed: November 3, 2006
    Publication date: May 10, 2007
    Inventors: Jessica Posey-Dowty, Thelma Watterson, Kevin Edgar, Shane Kirk, Michael Welty, Jinghua Yuan, Michael Shelton, Larry Lingerfelt, Alan Wilson
  • Publication number: 20050192434
    Abstract: This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.
    Type: Application
    Filed: November 23, 2004
    Publication date: September 1, 2005
    Inventors: Charles Buchanan, Norma Buchanan, Susan Carty, Chung-Ming Kuo, Juanelle Lambert, Jessica Posey-Dowty, Thelma Watterson, Matthew Wood, Michael Malcolm, Margaretha Lindblad