Patents by Inventor James R. Mitrano

James R. Mitrano 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).

  • Phosphonitrilic chloride trimer purification
    Patent number: 4605539
    Abstract: Polymer-grade cyclic phosphonitrilic chloride trimer can be obtained from crude cyclic polyphosphonitrilic chlorides by forming a solution of the crude cyclics, water washing the solution, distilling solvent to form a hot concentrate, cooling to form a precipitate and distilling the precipitate to form polymer-grade trimer.
    Type: Grant
    Filed: November 16, 1984
    Date of Patent: August 12, 1986
    Assignee: Ethyl Corporation
    Inventors: J. Robert Adams, Jr., James R. Mitrano, Matthew K. Juneau
  • Phosphazene trimer purification
    Patent number: 4603038
    Abstract: Cyclic phosphonitrilic chloride trimer suitable for polymerization to light colored, high molecular weight, linear polyphosphonitrilic chloride can be made by (1) reacting PCl.sub.5 and NH.sub.4 Cl in an inert solvent (e.g. monochlorobenzene) to form a solution of a low molecular weight linear and cyclophosphonitrilic chlorides, (2) evaporating solvent to form a concentrate, (3) adding water and cooling the mixture to precipitate cyclic trimer, (4) separation of the trimer precipitate and (5) distillation of the separated trimer.
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: July 29, 1986
    Assignee: Ethyl Corporation
    Inventors: J. Robert Adams, Jr., James R. Mitrano, Matthew K. Juneau