Patents by Inventor Dwaipayan Chaudhuri

Dwaipayan Chaudhuri 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: 5437809
    Abstract: A conditioning shampoo composition comprises, as the conditioning agents thereof, from 0.1 to 4.0% by weight of one or more dimethicone copolyols having an ethylene oxide/propylene oxide (EO/PO) ratio of from 20/80 to 80/20 and from 0.5 to 4.0% by weight of one or more non-ionic emulsifiers having an HLB of from 8 to 12 and which do not affect the foaming property of the shampoo.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: August 1, 1995
    Assignee: The Gillette Company
    Inventor: Dwaipayan Chaudhuri, deceased
  • Patent number: 4822596
    Abstract: A personal antiperspirant product contains a moisture-absorbent polymer instead of or in addition to the usual metal salt. The product is applied to the skin in a finely divided form to give a dry, non-sticky deposit for absorbing skin moisture such as perspiration. The polymer is capable of absorbing an amount of moisture at least equal to its own weight after depositing the product onto the skin.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: April 18, 1989
    Assignee: Lever Brothers Company
    Inventors: Martin Callingham, Dwaipayan Chaudhuri, Kenneth V. Curry, Barry G. Pike, Michael B. Taylor
  • Patent number: 4743440
    Abstract: A personal antiperspirant product contains a moisture-absorbent polymer instead of or in addition to the usual metal salt. The product is applied to the skin in a finely divided form to give a dry, non-sticky deposit for absorbing skin moisture such as perspiration. The polymer is capable of absorbing an amount of moisture at least equal to its own weight after depositing the product onto the skin.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: May 10, 1988
    Assignee: Lever Brothers Company
    Inventors: Martin Callingham, Dwaipayan Chaudhuri, Kenneth V. Curry, Barry G. Pike, Michael B. Taylor
  • Patent number: 4650670
    Abstract: A personal, propellant-free antiperspirant product contains a moisture-absorbent polymer instead of or in addition to the usual metal salt. The product is applied to the skin to give a dry deposit containing the polymer for absorbing skin moisture such as perspiration. The polymer is capable of absorbing an amount of moisture at least equal to its own weight after depositing the product onto the skin.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: March 17, 1987
    Assignee: Lever Brothers Company
    Inventors: Martin Callingham, Dwaipayan Chaudhuri, Kenneth V. Curry, Barry G. Pike, Michael B. Taylor
  • Patent number: 4508705
    Abstract: An antiperspirant composition for topical application to human skin comprises a moisture-absorbent water-insoluble polymer which is substantially dry to the touch when swollen with water, a surfactant having a melting point of from 30.degree. to 75.degree. C. and an organic solvent in which the polymer is substantially insoluble. The polymer has a water absorption value of at least 2, preferably 5 to 500. Preferred polymers are derived from anionic polyelectrolytes.The antiperspirant composition can be packaged in a dispenser or other container such as a propellant pressurized aerosol device, a finger-operated pump spray device or a roll-ball applicator.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: April 2, 1985
    Assignee: Lever Brothers Company
    Inventors: Dwaipayan Chaudhuri, Malcolm R. Stebles