Patents Represented by Attorney P. Jonathan

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  • Process for making electrical insulating paper and the product thereof
    Patent number: 4407697
    Abstract: The invention relates to a method for improving the thermal stability and dielectric integrity of a cellulosic web product. The cellulosic web is impregnated with a nitrogen donor compound such that the web contains not less than 0.2% by weight of the compound and thereafter impregnated with an aqueous vegetable protein solution at a pH of not less than about 8.5.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: October 4, 1983
    Assignee: McGraw-Edison Company
    Inventors: Fred S. Sadler, Paul F. Hettwer, Vu H. Viet, Clarance R. Acker