Patents by Inventor Stanley Robert

Stanley Robert 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).

  • Smoke retardants for polyvinyl halides and polystyrenes
    Patent number: 4011194
    Abstract: Metal-2-mercaptobenzothiazoles, metal-2-mercaptobenzoxazoles, and metal-2-mercaptobenzimidazoles are used as smoke retardants for polyvinyl halides and polystyrenes and have the general structure of ##STR1## WHERE R and R.sup.1 can be a hydrogen, alkyl, aryl, alkylaryl or halogen, X is either oxygen, sulfur or NR.sup.2, M is a metal, n is an integer equal to the valence of the metal and R.sup.2 can be a hydrogen, alkyl, aryl or alkylaryl group.
    Type: Grant
    Filed: October 16, 1975
    Date of Patent: March 8, 1977
    Assignee: Pennwalt Corporation
    Inventor: Stanley Robert Sandler
  • Polyoxyalkylene fluoroalkyltrimellitates
    Patent number: 3994951
    Abstract: Novel polyoxyalkylene fluoroalkyltrimellitate compounds are disclosed that are useful for improving the soil release properties of textiles. These compounds may be conveniently prepared by reacting a fluorinated alkyl thiol or amine with trimellitic anhydride monoacid chloride to form a fluorinated trimellitic anhydride intermediate product which is then reacted with a polyoxyalkylene derivative.
    Type: Grant
    Filed: July 17, 1975
    Date of Patent: November 30, 1976
    Assignee: Pennwalt Corporation
    Inventor: Stanley Robert Sandler