Patents by Inventor Roger W. Pengilly

Roger W. Pengilly 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).

  • Cationic diazo dyes for the dyeing of hair
    Patent number: 5879413
    Abstract: Diazo dyes of the general formula (I) ##STR1## are described where X.sup.+ is a quaternary ammonium group and Y.sup.- is a counterbalancing anion. The dyes are useful for coloring hair.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: March 9, 1999
    Assignee: Warner-Jenkinson Europe Limited
    Inventors: Roger W. Pengilly, Francis C. P. McLoughlin, Roger G. J. C. Twigg
  • Hairspray containing a hairspray resin and a drag reducing agent
    Patent number: 4192862
    Abstract: The invention relates to a hairspray product having improved hair-holding properties. The hairspray composition comprises, as is usual, a solution of a hairspray resin in a suitable solvent, but to improve the holding power there is also included a minor amount of a drag reducing agent which is soluble in the solvent for the hairspray resin. The drag reducing agent is present in an amount such that the weight ratio of the hairspray resin to the drag reducing agent is 10,000 to 2:1. The drag reducing agent amounts to less than 0.3% by weight of the composition.
    Type: Grant
    Filed: July 26, 1978
    Date of Patent: March 11, 1980
    Assignee: Lever Brothers Company
    Inventor: Roger W. Pengilly