Patents by Inventor Vu H. Nguyen

Vu H. Nguyen 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).

  • Lead acid battery with separator having long fibers
    Patent number: 4265985
    Abstract: A battery separator is provided that has 30-70% polyolefin synthetic pulp, 15-65% siliceous filler and 1-35% by weight of long fibers having lengths of between 1/4 and 1 inch. The long fibers may be polyester fibers or glass fibers or a mixture. Cellulose may be included in an amount up to about 10%.A process for forming the battery separator is also revealed using standard paper making equipment but employing ionic copolymers containing acrylamide in cationic and anionic combination to give good affinity of the siliceous material and polyolefin. Alum and other processing aids are also included as are other procedural steps such as pressing the web.
    Type: Grant
    Filed: May 23, 1980
    Date of Patent: May 5, 1981
    Assignee: W. R. Grace & Co.
    Inventors: Dennis D. O'Rell, Nigel I. Palmer, Vu H. Nguyen
  • Battery separator
    Patent number: 4216281
    Abstract: A battery separator is provided that has 30-70% polyolefin synthetic pulp, 15-65% siliceous filler and 1-35% by weight of long fibers having lengths of between 1/4 and 1 inch. The long fibers may be polyester fibers or glass fibers or a mixture. Cellulose may be included in an amount up to about 10%.A process for forming the battery separator is also revealed using standard paper making equipment but employing ionic copolymers containing acrylamide in cationic and anionic combination to give good affinity of the siliceous material and polyolefin. Alum and other processing aids are also included as are other procedural steps such as pressing the web.
    Type: Grant
    Filed: August 21, 1978
    Date of Patent: August 5, 1980
    Assignee: W. R. Grace & Co.
    Inventors: Dennis D. O'Rell, Nigel I. Palmer, Vu H. Nguyen