Patents by Inventor Pierre E. Nel

Pierre E. Nel 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).

  • Laminar electrical cells and batteries
    Patent number: 4361633
    Abstract: Laminar electrical cells and batteries of the LeClanche type especially adapted for service at high drain rates with variable duty cycles by the inclusion of cathodes formed as slurries of MnO.sub.2 and carbon particles in an electrolyte comprising, by weight, about 2% of NH.sub.4 Cl, about 25% ZnCl.sub.2, and the balance water with a minor amount of mercuric chloride.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: November 30, 1982
    Assignee: Polaroid Corporation
    Inventors: Pierre E. Nel, Joanne C. Pleskowicz
  • Film pack with means for urging positive and negative sheets together
    Patent number: 4126465
    Abstract: Means are provided in a photographic film pack for urging the superposed sheet elements of a diffusion transfer film unit together during the withdrawal of said film unit from its container. Said means are useful for eliminating white specks in the resultant positive transfer print.
    Type: Grant
    Filed: November 12, 1974
    Date of Patent: November 21, 1978
    Assignee: Polaroid Corporation
    Inventor: Pierre E. Nel