Patents by Inventor Daniel Sera

Daniel Sera 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).

  • Product for topical application containing a lipase and a hydroxy acid precursor
    Patent number: 6488928
    Abstract: The present invention concerns a product for topical application, capable of releasing a hydroxy acid on the skin, containing a lipase as enzyme and at least one precursor of the hydroxy acid. The precursor is an ester of the hydroxy acid, containing at least one ester functional group having a saturated or unsaturated, linear or branched chain and from 2 to 25 carbon atoms. According to a preferred form, the precursor and the lipase are packaged so as not to be in contact with one another until the time of application to the skin.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: December 3, 2002
    Assignee: L'Oreal
    Inventors: Emmanuelle Maurin, Daniel Sera, Gerard Guth
  • Active/stable artificial tanning compositions comprising DHA derivatives
    Patent number: 5972313
    Abstract: Stable, topically applicable cosmetic/dermatological compositions well suited for artificially tanning or browning human skin and appropriately packaged, comprise at least one dihydroxyacetone (DHA) derivative convertible into DHA and, advantageously, at least one active species for effecting such conversion.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: October 26, 1999
    Assignee: Societe L'Oreal S.A.
    Inventors: Remy Tuloup, Christian Blaise, Michel Philippe, Daniel Sera, Armelle De Salvert
  • Product for topical application containing a lipase and an active ingredient precursor
    Patent number: 5932232
    Abstract: The present invention concerns a product for topical application, capable of releasing a cosmetic and/or dermatological active ingredient in and/or on the skin, containing a lipase enzyme and at least one ester precursor of the active ingredient. The ester contains an ester functional group having a saturated or unsaturated, linear or branched chain having from 2 to 25 carbon atoms. According to a preferred embodiment, the precursor and lipase are packaged so as not to be in contact with one another until the time of application to the skin.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: August 3, 1999
    Assignee: L'Oreal
    Inventors: Armelle De Salvert, Daniel Sera, Gerard Guth, Pierre Fodor, Emmanuelle Maurin
  • Product for topical application containing a lipase and an active ingredient precursor
    Patent number: 5788972
    Abstract: The present invention concerns a product for topical application, capable of releasing a cosmetic and/or dermatological active ingredient in and/or on the skin, containing a lipase enzyme and at least one ester precursor of the active ingredient. The ester contains an ester functional group having a saturated or unsaturated, linear or branched chain having from 2 to 25 carbon atoms. According to a preferred embodiment, the precursor and lipase are packaged so as not to be in contact with one another until the time of application to the skin.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: August 4, 1998
    Assignee: L'Oreal
    Inventors: Armelle De Salvert, Daniel Sera, Gerard Guth, Pierre Fodor, Emmanuelle Maurin
  • Composition containing a dihydroxyacetone precursor
    Patent number: 5693670
    Abstract: The invention relates to a composition, which may be cosmetic or dermatological, Containing at least one dihydroxyacetone precursor. The invention also relates to a composition, which may be cosmetic or dermatological, containing at least one dihydroxyacetone precursor and a compound capable of converting this precursor into dihydroxyacetone. Finally, the invention relates to such a composition packaged in a specific manner and to the use of the composition for artificial tanning of the skin.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: December 2, 1997
    Assignee: L'Oreal
    Inventors: Michel Philippe, Remy Tuloup, Armelle de Salvert, Daniel Sera, Pierre Fodor