Patents by Inventor John Francis Start

John Francis Start 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).

  • Flame-retardant regenerated cellulose filaments containing oligomeric phosphonitrilic compounds
    Patent number: 4040843
    Abstract: Regenerated cellulose filaments containing a flame-retardant amount of liquid oligomeric compounds, prepared by heating together liquid polyphosphonitrilic esters with phosphoric anhydride, and method for preparing same.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: August 9, 1977
    Assignee: FMC Corporation
    Inventors: Borivoj Richard Franko-Filipasic, John Francis Start
  • Polymeric phosphazenes
    Patent number: 3990900
    Abstract: A novel process consisting of reacting a phosphonitrilic chloride with an alcohol or alkoxide to 12 carbon atoms to produce a partially esterified phosphonitrilic chloride, removing impurities from the chloroester and heating the ester to form a condensed polymeric phosphazene with P-O-P oxygen linkages. This new class of polymer phosphazenes, with P-O-P oxygen linkages, is unusually efficacious in rendering rayon flame-retardant.
    Type: Grant
    Filed: February 14, 1974
    Date of Patent: November 9, 1976
    Assignee: FMC Corporation
    Inventors: Borivoj Richard Franko-Filipasic, Edward Francis Orwoll, John Francis Start
  • Flame retardant regenerated cellulose filaments containing polymeric phosphazenes
    Patent number: 3986882
    Abstract: Regenerated cellulose filaments having dispersed therein a flame-retardant amount of phosphonitrilic esters containing a substantial amount of cyclic structures, dimerized, oligomerized, or polymerized, that are prepared by esterification of a phosphonitrilic chloride polymer with ethylene glycol.
    Type: Grant
    Filed: November 12, 1973
    Date of Patent: October 19, 1976
    Assignee: FMC Corporation
    Inventors: Borivoj Richard Franko-Filipasic, John Francis Start