Patents by Inventor Robert J. Robillard

Robert J. Robillard 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).

  • Caulking tube with an improved seal to retard the passage of air
    Patent number: 4217995
    Abstract: The present invention relates to an improved caulking tube with a superior seal between the plunger and the rear of the caulking tube which is produced by coating the inside of the rear end of the body of the caulking tube with a moisture proof cohesive chemical material such that after the caulking tube is filled with the desired material and after the plunger is inserted there is produced an airtight moisture proof seal.
    Type: Grant
    Filed: February 28, 1978
    Date of Patent: August 19, 1980
    Assignee: General Electric Company
    Inventor: Robert J. Robillard