Patents by Inventor Shyam B. Advani

Shyam B. Advani 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).

  • Patent number: 4915947
    Abstract: There are disclosed microcapsules containing a phytotoxic compound of the formula: ##STR1## where x is oxygen or sulfur and R is alkyl, alkoxy, alkylamino, halo, nitro or hydrogen, and the microcapsule walls comprise resinous polycondensates which are crosslinked polyurea, crosslinked polyamide or crosslinked polyamide-polyurea wherein the degree of crosslinking is about 25-100%, the walls are about 10 to about 30% of the total weight of the microcapsules, and the microcapsules have an average size ranging from about 7 to about 25 microns in diameter.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: April 10, 1990
    Assignee: Pennwalt Corporation
    Inventors: Jean Thenard, Shyam B. Advani
  • Patent number: 4906280
    Abstract: T-butylhydrazides of carboxylic acid anhydrides and carboxylic acid chlorides useful as plant growth regulants in the free acid form or their equivalent salts.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: March 6, 1990
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Shyam B. Advani