Patents by Inventor Pushpkumar D. Cuangani

Pushpkumar D. Cuangani 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).

  • Filter elements
    Patent number: 4232130
    Abstract: A polyolefin filter for tobacco products and the like was prepared. The extruded element is an open-cell foamed polyethylene or polypropylene having a TPM filtration efficiency greater than 20%. The filter rod can be made by extruding polyethylene containing less than 0.2 moles of a volatile blowing agent per 100 grams of resin at a melt temperature between 130.degree. C. and 150.degree. C., the temperature of the die being between 120.degree. C. and 136.degree. C. Higher melt temperature and die temperature are required for polypropylenes.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: November 4, 1980
    Assignee: Monsanto Chemicals Limited
    Inventors: Samuel Baxter, Pushpkumar D. Cuangani