Patents by Inventor Karl Pechmann

Karl Pechmann 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).

  • Antistatic photographic element
    Patent number: 4275147
    Abstract: The susceptibility of polymeric film supports or polymeric coated paper to the accumulation of static electric charges can be greatly lessened by coating or swabbing such support or the uncoated side of a finished photographic film and paper with a polyfunctional anionic oligomeric surfactant or the alkali metal salt thereof, of the formula: ##STR1## wherein R is an alkyl radical of 6-12 carbon atoms, R.sub.1 is H or methyl and a+b is from 4-50.
    Type: Grant
    Filed: July 11, 1980
    Date of Patent: June 23, 1981
    Assignee: GAF Corporation
    Inventors: E. Scudder Mackey, Karl Pechmann