Patents by Inventor Carlos Alberto Cavalca

Carlos Alberto Cavalca 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).

  • Ionomer for use in fuel cells and method of making same
    Patent number: 7405015
    Abstract: The reaction product of a monomer comprising phthalazinone and a phenol group, and at least one sulfonated aromatic compound. The monomer comprising phthalazinone and a phenol group is used in a reaction with the sulfonated aromatic compound to produce ionomers with surprising and highly desirable properties. In one embodiment, the inventive ionomer is a sulfonated poly(phthalazinone ether ketone), hereinafter referred to as sPPEK. In another embodiment, the inventive ionomer is a sulfonated poly(phthalazinone either sulfone), herein after referred to as SPPES. In another embodiment, the inventive ionomer is other sulfonated aromatic polymeric compounds. The invention further includes the formation of these polymers into membranes and their use for polymer electrolyte membrane fuel cells (PEMFC), and in particular for direct methanol fuel cells (DMFC).
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: July 29, 2008
    Assignee: Gore Enterprise Holdings, Inc.
    Inventors: Guyu Xiao, Guomin Sun, Deyue Yan, Xinyuan Zhu, Charles W. Martin, Huey Wu, Karine Gulati, Carlos Alberto Cavalca
  • Ionomer for use in fuel cells and method of making same
    Patent number: 7297429
    Abstract: The reaction product of a monomer comprising phthalazinone and a phenol group, and at least one sulfonated aromatic compound. The monomer comprising phthalazinone and a phenol group is used in a reaction with the sulfonated aromatic compound to produce ionomers with surprising and highly desirable properties. In one embodiment, the inventive ionomer is a sulfonated poly(phthalazinone ether ketone), hereinafter referred to as sPPEK. In another embodiment, the inventive ionomer is a sulfonated poly(phthalazinone ether sulfone), herein after referred to as sPPES. In another embodiment, the inventive ionomer is other sulfonated aromatic polymeric compounds. The invention further includes the formation of these polymers into membranes and their use for polymer electrolyte membrane fuel cells (PEMFC), and in particular for direct methanol fuel cells (DMFC).
    Type: Grant
    Filed: April 28, 2003
    Date of Patent: November 20, 2007
    Assignee: Gore Enterprise Holdings, Inc.
    Inventors: Carlos Alberto Cavalca, Karine Gulati
  • Ionomer for use in fuel cells and method of making same
    Publication number: 20040214064
    Abstract: The reaction product of a monomer comprising phthalazinone and a phenol group, and at least one sulfonated aromatic compound. The monomer comprising phthalazinone and a phenol group is used in a reaction with the sulfonated aromatic compound to produce ionomers with surprising and highly desirable properties. In one embodiment, the inventive ionomer is a sulfonated poly(phthalazinone ether ketone), hereinafter referred to as sPPEK. In another embodiment, the inventive ionomer is a sulfonated poly(phthalazinone ether sulfone), herein after referred to as sPPES. In another embodiment, the inventive ionomer is other sulfonated aromatic polymeric compounds. The invention further includes the formation of these polymers into membranes and their use for polymer electrolyte membrane fuel cells (PEMFC), and in particular for direct methanol fuel cells (DMFC).
    Type: Application
    Filed: April 28, 2003
    Publication date: October 28, 2004
    Inventors: Carlos Alberto Cavalca, Karine Gulati