Patents by Inventor Chester F. Clark

Chester F. Clark 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).

  • Patent number: 5041661
    Abstract: A process for preparing triaminoguanidine nitrate from relatively impure -99 percent)/commercial guanidine nitrate and commercial grade aqueous hydrazine (50-64 weight percent) in alcohol by: (1) adding enough hydrazine to form monoaminoguanidine nitrate, diaminoguanidine nitrate, or mixtures thereof, (2) physically removing the alcohol insoluble, solid impurities from the solution, (3) adding the remainder of the hydrazine needed to form triaminoguanidine nitrate, (4) adding nitric acid to adjust the pH to from 4.5 to 5.5, and (6) isolating the product triaminoguanidine nitrate.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: August 20, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kerry L. Wagaman, Chester F. Clark, Larry D. Henderson
  • Patent number: 4419155
    Abstract: An explosive ternary nitrate mixture of ethylenediamine dinitrate, ammonium itrate, and potassium is prepared by mixing together approximately stoichiometric amounts of aqueous nitric acid, ethylenediamine, ammonia, and potassium hydroxide at a temperature of less than about 130.degree. C. The additions can be made simultaneously or sequentially in any order.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: December 6, 1983
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kerry L. Wagaman, Chester F. Clark, Larry D. Henderson, W. Steven Jones
  • Patent number: H1778
    Abstract: A process for producing high bulk density spheroidal nitroguanidine by fong a solution of from 2 to 9 weight percent of nitroguanidine, 0.5 to 2.0 weight percent of methylcellulose, and 0.5 to 2.0 weight percent of partially hydrolyzed poly(vinyl alcohol) in water at a temperature of from 50.degree. C. to 100.degree. C., and then cooling the solution at a rate of from I to 20.degree. C./minute until the solution temperature is less than 40.degree. C.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: February 2, 1999
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Kerry L. Wagaman, Chester F. Clark, William S. Jones, Steven L. Collignon, Christopher C. Wilmot