Patents by Inventor Sadanand V. Pathre

Sadanand V. Pathre 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).

  • Oligo (2-alkenyl azlactones)
    Patent number: 5091489
    Abstract: This invention provides novel azlactone-functional oligomers of 2-alkenyl azlactones in which oligomerization has occurred predominantly via the 2-alkenyl group. Oligomerization of the 2-alkenyl group provides oligomers having 2 to 15 mer units with predominantly carbon-carbon backbone segments. Oligomerized in this fashion, the novel compositions possess azlactone groups which can be reacted with nucleophiles in the normal ring-opening sense. The oligomers are prepared by a novel process in which both Lewis and Bronsted acidic catalysts are effective. The reactive oligomers find utility as crosslinking agents for polymers containing azlactone-reactable nucleophilic groups.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: February 25, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Heilmann, Dean M. Moren, Jerald K. Rasmussen, Larry R. Krepski, Sadanand V. Pathre
  • Oligo(2-alkenyl azlactones)
    Patent number: 5081197
    Abstract: This invention provides novel azlactone-functional oligomers of 2-alkenyl azlactones in which oligomerization has occurred predominantly via the 2-alkenyl group. Oligomerization of the 2-alkenyl group provides oligomers having 2 to 15 mer units with predominantly carbon-carbon backbone segments. Oligomerized in this fashion, the novel compositions possess azlactone groups which can be reacted with nucleophiles in the normal ring-opening sense. The oligomers are prepared by a novel process in which both Lewis and Bronsted acidic catalysts are effective. The reactive oligomers find utility as crosslinking agents for polymers containing azlactone-reactable nucleophilic groups.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: January 14, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Steven M. Heilmann, Dean M. Moren, Jerald K. Rasmussen, Larry R. Krepski, Sadanand V. Pathre