Patents by Inventor David John Des Marais

David John Des Marais 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).

  • Glass-sealed vessel opening device and method
    Patent number: 4121634
    Abstract: A device for opening glass-sealed vessels in order either to recover a gas from or to introduce a gas into a vacuum system or other confined atmosphere comprises first vessel receiving means adapted removably to receive therein a projecting end of the glass-sealed vessel along with second vessel receiving means similarly adapted removably to receive therein the projecting end of the glass-sealed vessel, with the proximal ends of the first and second vessel receiving means being positioned adjacent each other.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: October 24, 1978
    Assignee: Indiana University Foundation
    Inventors: John Michael Hayes, David John Des Marais