Patents by Inventor Robert Estrade

Robert Estrade 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).

  • Processes for manufacturing inner tubes of the so-called puncture-proof type for vehicle wheels and similar and puncture-proof inner tubes thus obtained
    Patent number: 4367109
    Abstract: Inner tubes for pneumatic tires including a toric cushion made from an elastomer material having cells independent of each other.A process for manufacturing such inner tubes with a mold for preforming and vulcanizing semi-toric elements, the mold includes fingers for molding recessed cavities and an incorporated heating network, the preformed semi-toric elements having undergone a first vulcanization are then joined together and subjected to a second vulcanization in an appropriate apparatus.
    Type: Grant
    Filed: October 7, 1980
    Date of Patent: January 4, 1983
    Assignee: Hutchinson-Mapa
    Inventors: Robert Estrade, Jean Michaut