Patents by Inventor Frank D. Marsh

Frank D. Marsh 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 and composition for suppressing the nitrification of ammonium nitrogen in soil
    Patent number: 4482371
    Abstract: Certain polychloromethyl-substituted benzene and naphthalene compounds are useful for suppressing the nitrification of ammonium nitrogen in soil.
    Type: Grant
    Filed: April 14, 1983
    Date of Patent: November 13, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Peter G. Heytler, Frank D. Marsh
  • Chlorination and crosslinking of selected polymers with Cl.sub.2 O or HOCl
    Patent number: 4405760
    Abstract: Contacting selected polymers with Cl.sub.2 O or HOCl to effect (1) substitution of chlorine for hydrogen bonded to carbon, and (2) crosslinking when the polymer contains carbon-carbon unsaturation.
    Type: Grant
    Filed: December 28, 1981
    Date of Patent: September 20, 1983
    Assignee: E. I. Du Pont de Nemours & Company
    Inventors: Edward G. Howard, Jr., Frank D. Marsh
  • Chlorination process
    Patent number: 4327036
    Abstract: Process for nuclear chlorination of non-phenolic aromatic compounds, said process comprising contacting and reacting a non-phenolic aromatic compound having a net Hammett .sigma. value of about -0.1 to about 2.0 with chlorine monoxide in the presence of at least one-half an equivalent amount, based on the chlorine monoxide, of an acid having a pK.sub.a no greater than that of trichloroacetic acid, provided, however, when the net Hammett .sigma. value is about 0.7 to about 2.0, the acid has a pK.sub.a no greater than that of trifluoroacetic acid.
    Type: Grant
    Filed: May 8, 1980
    Date of Patent: April 27, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank D. Marsh
  • .alpha.-Chlorination process
    Patent number: 4226783
    Abstract: A process for .alpha.-chlorination of side chains of electronegatively substituted aromatic compounds with dichlorine monoxide.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: October 7, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank D. Marsh