Patents by Inventor Robert R. Orndoff

Robert R. Orndoff 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).

  • Method for the preparation of tetranitrodibenzotetrazapentalene
    Patent number: 4526980
    Abstract: Tetranitrodibenzo-1,3a,4,6a-tetrazapentalene is prepared from diaminobenzene by reacting diaminobenzene and lead dioxide in ethylacetate to produce diaminoazobenzene, isolating the product by silica-gel elution, reacting diaminoazobenzene with an inorganic azide in a dilute aqueous nitrous acid solution at a temperature not in excess of 10.degree. C. to produce diazidoazobenzene, isolating the product, heating diazidoazobenzene slowly to about 190.degree. C. until nitrogen stops evolving to form dibenzotetrazapentalene, isolating the product, nitrating dibenzotetrazapentalene with concentrated sulfuric acid and forming nitric at a temperature not in excess of about 65.degree. C. to product tetranitrodibenzo-1,3a,4,6a-tetrazapentalene.
    Type: Grant
    Filed: July 6, 1983
    Date of Patent: July 2, 1985
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marguarite S. Chang, Robert R. Orndoff
  • Synthesis of dimethylmethylene dinitramine
    Patent number: 4476322
    Abstract: A process for preparing 2,4-dinitro-2,4-diazapentane by(1) nitrating dimethylurea to form dimethyldinitrourea;(2) hydrolyzing the dimethyldinitrourea to form methylnitramine;(3) reacting one mole of methylamine with one mole of formaldehyde in aqus solution to form 2-nitro-2-aza-1-propanol; and(4) reaction one mole of methylnitramine with each mole of 2-nitro-2-aza-1-propanol to form one mole of 2,4-dinitro-2,4-diazapentane.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: October 9, 1984
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marguerite S. Chang, Robert R. Orndoff
  • Synthesis of dimethylmethylene dinitramine
    Patent number: 4418212
    Abstract: A process for preparing 2,4-dinitro-2,4-diazapentane by(1) nitrating dimethylurea to form dimethyldinitrourea;(2) hydrolyzing the dimethyldinitrourea to form methylnitramine;(3) reacting one mole of methylamine with one mole of formaldehyde in aqus solution to form 2-nitro-2-aza-1-propanol; and(4) reaction one mole of methylnitramine with each mole of 2-nitro-2-aza-1-propanol to form one mole of 2,4-dinitro-2,4-diazapentane.
    Type: Grant
    Filed: July 1, 1982
    Date of Patent: November 29, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marguerite S. Chang, Robert R. Orndoff