Patents by Inventor Bruce D. Perlson

Bruce D. Perlson 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).

  • Corrosion inhibited freeze protected heat transfer fluid
    Patent number: 4545925
    Abstract: An improved corrosion inhibited, freeze protected, heat transfer fluid or antifreeze composition which is comprised of at least about 0.25 weight percent phosphate as PO.sub.4, greater than 0.025 weight percent nitrite as NO.sub.2, and the balance a polyhydroxy alcohol; with the proviso that nitrate not be present in the heat transfer fluid. When the heat transfer fluid is to be used as an antifreeze composition for internal combustion engines, it can also contain a corrosion inhibitor selected from the group consisting of 2-mercaptobenzotriazole, tolyltriazole, benzotriazole, and alkali metal salts thereof and a buffering agent.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: October 8, 1985
    Assignee: Norchem, Inc.
    Inventors: Sidney F. Bosen, Bruce D. Perlson