Patents by Inventor Brian D. Hofrichter

Brian D. Hofrichter 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).

  • Antiperspirant gel stick compositions
    Patent number: 5591424
    Abstract: An antiperspirant gel stick composition incorporating a gelling agent, including a primary gellant selected from the group consisting of 12-hydroxystearic acid, esters of 12-hydroxystearic acid, amides of 12-hydroxystearic acid, and mixtures thereof and a secondary gellant selected from the group consisting of n-acyl amino acid amide derivatives. The antiperspirant gel stick compositions further incorporate a liquid base material including a non-polar, volatile oil and a relatively polar, non-volatile co-solvent. The combination of the gelling agent and the co-solvent permit the utilization of relatively high levels of a non-polar volatile oils which provide a dry feel.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 7, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Brian D. Hofrichter, John M. Gardlik, Philip A. Sawin, John P. Luebbe, Barton J. Bradbury
  • Antiperspirant gel stick compositions
    Patent number: 5429816
    Abstract: An antiperspirant gel stick composition incorporating a gelling agent, including a primary gellant selected from the group consisting of 12-hydroxystearic acid, esters of 12-hydroxystearic acid, amides of 12-hydroxystearic acid, and mixtures thereof and a secondary gellant selected from the group consisting of n-acyl amino acid amide derivatives. The antiperspirant gel stick compositions further incorporate a liquid base material including a non-polar, volatile oil and a relatively polar, non-volatile co-solvent. The combination of the gelling agent and the co-solvent permit the utilization of relatively high levels of a non-polar volatile oils which provide a dry feel.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: July 4, 1995
    Assignee: Procter & Gamble
    Inventors: Brian D. Hofrichter, John M. Gardlik, Philip A. Sawin, John P. Luebbe, Barton J. Bradbury
  • Gel stick antiperspirant composition containing 2-oxazolidinone derivative and process for making them
    Patent number: 5200174
    Abstract: Antiperspirant compositions in the form of gel sticks, having acidic pH, and including an antiperspirant active, a gelling agent which comprises a dibenzylidene alditol, or mixture thereof, a hydroxy solvent for the gelling agent, and a 2-oxazolidinone derivative having a C.sub.1 -C.sub.4 alkyl radical substituted at the 3 position of the heterocyclic ring are disclosed.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: April 6, 1993
    Assignee: Procter & Gamble
    Inventors: John M. Gardlik, Brian D. Hofrichter