Patents by Inventor Rosemary Przyklek-Elling

Rosemary Przyklek-Elling 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).

  • Isotelluroazolo[1,5-a]tellurazoles and processes for their preparation
    Patent number: 4772715
    Abstract: Isotellurazolo[1,5-a]tellurazoles are disclosed. These heterocycles can be prepared by reacting a diarylformamidine with an aromatic tellurazolium salt which is substituted at its 2 ring position with a methine group precursor. The product heterocycles are useful directly for their blue light absorption and in forming stable heterocyclic nuclei containing compounds, such as a photographic addenda.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: September 20, 1988
    Assignee: Eastman Kodak Company
    Inventors: Wolfgang H. H. Gunther, Rosemary Przyklek-Elling
  • Quaternized 2,1,4-benzoxatellurazinium and 2,1,4-naphthoxatellurazinium salt derivitives
    Patent number: 4677202
    Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by quaternized aromatic oxatellurazinium salts. The aromatic oxatellurazinium salts can be initially incorporated in the photographic element as manufactured or during processing.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: June 30, 1987
    Assignee: Eastman Kodak Company
    Inventors: Rosemary Przyklek-Elling, Wolfgang H. H. Gunther, Roger Lok
  • Quaternized tellurium salt fog inhibiting agents for silver halide photography
    Patent number: 4661438
    Abstract: Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by quaternized aromatic oxatellurazinium salts. The aromatic oxatellurazinium salts can be initially incorporated in the photographic element as manufactured or during processing.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: April 28, 1987
    Assignee: Eastman Kodak Company
    Inventors: Rosemary Przyklek-Elling, Wolfgang H. H. Gunther, Roger Lok