Patents by Inventor James L. Isonhood

James L. Isonhood 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).

  • Curtain coating process for producing thin photoimageable coatings
    Patent number: 5236746
    Abstract: A process for producing thin photoresists on printed circuit boards wherein a metallic-layered substrate is conveyed beneath a free falling curtain of a photopolymerizable substance, said substance having a viscosity of 30-120 seconds DIN cup 4 @ 25.degree. C. and being applied at a curtain height of 5-25 cm. above the board to form a coating having a dry film thickness up to about 1.5 mil after the coated surfaces are dried, whereupon the surfaces are available for photoimaging, developing, etching and stripping operations.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: August 17, 1993
    Assignee: Ciba-Geigy Corporation
    Inventors: Diethard Kapp-Schwoerer, David C. Siemers, James L. Isonhood, Donald E. Miller