Patents by Inventor Bertrand M. Bloch

Bertrand M. Bloch 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).

  • Thermosetting polymers and prepolymers and a process for making them by polycondensation of a pyridine having at least three methyl substituants
    Patent number: 3994862
    Abstract: The thermosetting polymers and prepolymers of the invention are obtained by ondensing a pyridine comprising at least three methyl groups, such as trimethyl-2,4,6 pyridine, with an aromatic dialdehyde, such as trephthalic aldehyde at a temperature ranging from about 150.degree. to about 220.degree. C. They can be shaped and set by maintaining the temperature between about 200.degree. and about 300.degree. C. They are suitable for making laminates.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: November 30, 1976
    Assignee: Office National d'Etudes et de Recherches Aerospatiales (O.N.E.R.A.)
    Inventors: Marcel P. Ropars, Bertrand M. Bloch