Patents by Inventor Peter Critchley

Peter Critchley 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: 5415855
    Abstract: Modified ceramides are defined, together with their synthesis and compositions comprising them for topical application to human skin, hair and nails. The modified pseudoceramides have a structure: ##STR1## and an approximate summary is that R and R.sup.1 are aliphatic hydrocarbon, A is CH.sub.2, CHOR.sup.2, CH.dbd.CH or CHOY, and at least one of R.sup.2, R.sup.3 and R.sup.4 is sulphate, phosphate or similar. The presence of phosphate or sulphate facilitates skin absorption, after which the phosphate or sulphate is removed by enzymes present in vivo.
    Type: Grant
    Filed: June 22, 1993
    Date of Patent: May 16, 1995
    Assignee: Elizabeth Arden Co., Division of Conopco, Inc.
    Inventors: Peter Critchley, Susan E. Kirsch, Anthony V. Rawlings, Ian R. Scott
  • Patent number: 5326565
    Abstract: Novel pseudoceramides are defined, together with their synthesis and compositions comprising them for topical application to human skin, hair and nails.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: July 5, 1994
    Assignee: Elizabeth Arden Co.
    Inventors: Peter Critchley, Desmond B. Hagan, Susan E. Kirsch, David T. Parrott, Anthony V. Rawlings, Ian R. Scott, Anthony P. Taylor
  • Patent number: 5234825
    Abstract: The invention provides a process for reducing the galactose content of galactomannan by means of a substantially specific galactosidase enzyme preparation in which the galactomannan is incubated in the form of a hydrated preparation containing 2-70 percent by weight of galactomannan. Preferable this preparation contains 8-50 percent by weight of galactommanan. The process yields galactomannans with a reduced content of galactose of which those containing 15 to 19 percent of galactose are novel compound. These latter products are used with advantage in foodstuffs and cosmetic preparations.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: August 10, 1993
    Assignee: Unilever Patent Holdings, B.V.
    Inventors: Barry V. McCleary, Peter Critchley, Paul V. Bulpin
  • Patent number: 5206020
    Abstract: Novel pseudoceramides are compounds with a general structure (2): ##STR1## In this formula a is 0 or 1, b is 0 or 1 but if a is 0, b is also 0 and R has 1 to 8 carbon atoms. The substituents R and R.sup.1 are a range of substituted or unsubstituted aliphatic hydrocarbon substituents. R.sup.2 is hydrogen, a sugar residue, a sulphate residue or a phosphate residue. R.sup.3 is hydrogen or a fairly short chain hydrocarbon substituent which in turn may be substituted. All of the substituents R--R.sup.3 are more fully defined in claim 1. These novel compounds are effective to improve water barrier function of the stratum corneum. They may be incorporated into compositions for topical application to human skin, hair and nails. A synthetic route for obtaining the novel compounds is described.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: April 27, 1993
    Assignee: Elizabeth Arden Company, Division of Conopco, Inc.
    Inventors: Peter Critchley, Anthony V. Rawlings, Ian R. Scott
  • Patent number: 5198210
    Abstract: Novel pseudoceramides are defined, together with their synthesis and compositions comprising them for topical application to human skin, hair and nails.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: March 30, 1993
    Assignee: Elizabeth Arden Company, Division of Conopco, Inc.
    Inventors: Peter Critchley, Desmond B. Hagan, Susan E. Kirsch, David T. Parrot, Anthony V. Rawlings, Ian R. Scott, Anthony P. Taylor
  • Patent number: 4708863
    Abstract: The invention provides a deodorant composition for reducing axillary body odor without suppressing the secretion of perspiration, comprising a suspension of a particulate deodorant active material in a carrier liquid or gel medium containing less than 80% water by weight of the carrier medium, particularly an aerosol or roll-on composition, in which the deodorant active ingredient is a zinc carbonate.
    Type: Grant
    Filed: August 3, 1981
    Date of Patent: November 24, 1987
    Assignee: Lever Brothers Company
    Inventors: Brian Bews, Peter Critchley, James A. Durrant, Malcolm R. D. Stebles, Leigh R. H. Tipping
  • Patent number: 4659560
    Abstract: The invention provides a deodorant composition for reducing axillary body odor without suppressing the secretion of perspiration, comprising a suspension of a particulate deodorant active material in a carrier liquid or gel medium containing less than 80% water by weight of the carrier medium, particularly an aerosol or roll-on composition, in which the deodorant active ingredient is an oxide, hydroxide or carbonate of magnesium or lanthanum or a mixture thereof.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: April 21, 1987
    Assignee: Lever Brothers Company
    Inventors: Brian Bews, Peter Critchley, James A. Durrant, Malcolm R. D. Stebles, Leigh R. H. Tipping