Patents by Inventor by Helga Woolf, executrix

by Helga Woolf, executrix 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).

  • Partially fluorinated esters or amide/esters of benzene polycarboxylic acids, and dyeable pet and nylon fibers incorporating the same and process of making such fibers
    Patent number: 4209610
    Abstract: Polycarboxybenzenes esterified with certain partially fluorinated alcohols and with hydroxyl-containing organic radicals such as 2-hydroxyethyl, glyceryl and chlorohydryl or bromohydryl, leaving no free carboxy groups, when incorporated with PET or nylon fibers as by contact in a liquid medium, these compounds concentrate at the fiber surface especially if the fiber is annealed (heated without abrading above its T.sub.g). A relatively durable oil and water repellency is thus imparted to the fiber; which durability can be enhanced by contacting said compound in situ in the fiber with a polyepoxide or polyisocyanate.Alternatively, partially fluorinated N,N-disubstituted amides, esterified also with the same above-cited hydroxyl-containing organic radicals, can be used. The resulting fibers can be dyed, after or together with said treatment imparting repellency.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: June 24, 1980
    Inventors: Frank Mares, Bryce C. Oxenrider, Cyril Woolf, deceased, by Helga Woolf, executrix