Patents by Inventor Leon H. Chance

Leon H. Chance 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: 4900324
    Abstract: The acetals, 2,3-dihydroxy-1,1,4,4-tetramethoxybutane, 3,4-dihydroxy-2,5-dimethoxytetrahydrofuran, and glyceraldehyde dimethylacetal, when applied to cotton fabric by conventional pad-dry-cure procedures using special combined acid catalysts, were found to crosslink cellulose hydroxy groups at a very rapid rate (e.g., 20 seconds at 160.degree. C.), thereby imparting improved wrinkle recovery in the range of that required for durable press finishing. Cotton fabrics treated with these acetals have the advantage of no formaldehyde release.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: February 13, 1990
    Assignee: The United States of America, as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Gary F. Danna, Bethlehem K. Andrews
  • Patent number: 4818243
    Abstract: Acetals of glyceraldehyde, when applied to cotton fabric by conventional pad-dry-cure procedures using special combined acid catalysts, were found to crosslink the cellulose hydroxyl groups at a very rapid rate (e.g., 10 seconds at 170.degree. C.), thereby imparting improved wrinkle recovery. In particular, the aldehydes studied were the diethyl and dimethyl acetals of glyceraldehyde. The best results were obtained with glyceraldehyde dimethyl acetal.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: April 4, 1989
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Gary F. Danna
  • Patent number: 4405806
    Abstract: The following new compounds, useful in flame retardant compositions for cotton, are disclosed in the invention:2,4-diamino-6-carbamoylmethyl-1, 3,5-triazine (Ib),2,4-diamino-6-(dibromocyanomethyl)-1,3,5-triazine (IIa),2,4-diamino-6-(dibromocarbamoylmethyl)-1,3,5-triazine (IIb),2,4-diamino-6-(3,5-dibromo-4'-aminophenyl)-1,3,5-triazine (IIc),ethyl N-(2,4,6-tribromophenyl)glycinate (IV),N-(2,4,6-tribromophenyl)glycinamide (V),2,4-bis[di(hydroxymethyl)amino]-6-(3,5-dibromo-4'-aminophenyl)-1,3,5-triazi ne (III),2,4-diamino-6-(2',4',6'-tribromoanilinomethyl)-1,3,5-triazine (Id), and2,4-bis[di(hydroxymethyl)amino]-6-(2',4',6'-tribromoanilinomethyl)-1,3,5-tr iazine (VI).
    Type: Grant
    Filed: April 20, 1982
    Date of Patent: September 20, 1983
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: Leon H. Chance
  • Patent number: 4352930
    Abstract: The following new compounds, useful in flame retardant compositions for cotton, are disclosed in the invention:2,4-diamino-6-carbamoylmethyl-1,3,5-triazine (Ib),2,4-diamino-6-(dibromocyanomethyl)-1,3,5-triazine (IIa),2,4-diamino-6-(dibromocarbamoylmethyl)-1,3,5-triazine (IIb),2,4-diamino-6-(3,5-dibromo-4'-aminophenyl)-1,3,5-triazine (IIc),ethyl N-(2,4,6-tribromophenyl)glycinate (IV),N-(2,4,6-tribromophenyl)glycinamide (V),2,4-bis[di(hydroxymethyl)amino]-6-(3,5-dibromo-4'-amino-phenyl)-1,3,5-triaz ine (III),2,4-diamino-6-(2',4',6'-tribromoanilinomethyl)-1,3,5-triazine (Id), and2,4-bis[di(hydroxymethyl)amino]-6-(2',4',6'-tribromoanilinomethyl)-1,3,5-tr iazine (VI).
    Type: Grant
    Filed: June 24, 1981
    Date of Patent: October 5, 1982
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: Leon H. Chance
  • Patent number: 4055720
    Abstract: 2,4-Diamino-6(3,3,3-tribromo-1-propyl)-1,3,5-triazine and 2,4-diamino-6(3,3,3-trichloro-1-propyl)-1,3,5-triazine were prepared by the reaction of the corresponding methyl or ethyl .gamma.-tribromo-butyrate or methyl or ethyl .gamma.-trichlorobutyrate with biguanide. The N-methylol derivatives of the diaminotrihalopropyl triazines were prepared by the reaction of the triazines with aqueous formaldehyde. Two pure tetramethylol derivatives were prepared, namely: 2,4-bis[bis(hydroxymethyl)amino]-6-(3,3,3-tribromo-1-propyl)-1,3,5-triazin e and 2,4-bis[bis(hydroxymethyl)amino]-6-(3,3,3-trichloro-1-propyl)-1,3,5-triazi ne. The tetramethylol derivatives were used to impart durable flame retardancy and wrinkle recovery to cellulosic textiles, particularly to cotton. Flame-retardancy was also imparted to wool and to blends of cotton and polyester.
    Type: Grant
    Filed: May 25, 1976
    Date of Patent: October 25, 1977
    Assignee: The United States of America, as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Judy D. Timpa
  • Patent number: 4006203
    Abstract: The following new compounds were prepared from cyanoguanidine or guanylurea as potential flame retardants for cellulosic textiles -2-cyano-1-[bis-(dimethylamino)phosphinyl]guanidine, 2-cyano-1-(diethoxyphosphinyl)guanidine, and 2-carbamoyl-1-(diethoxyphosphinyl) guanidine. The successful phosphorylation of guanylurea required use of a dry, aprotic solvent.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: February 1, 1977
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Cletus E. Morris
  • Patent number: 4006274
    Abstract: 2,4,6-Tris(carbamoylmethylamino)-1,3,5-s-triazine, abbreviated TCMT, is prepared by the reaction of 2,4,6-tris(carbethoxymethylamino)-1,3,5-s-triazine with ammonia. The methylol derivative of TCMT is prepared and applied to cotton textiles and blends of cotton and polyester to impart wrinkle recovery thereto.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: February 1, 1977
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Judy D. Timpa, George L. Drake, Jr.
  • Patent number: 3979533
    Abstract: Derivatives of dicarboxylic acids containing a phosphono group in the alpha and alpha prime position have been made. These have a wide variety of uses as intermediates. Specifically, one of the new compounds is useful in imparting wrinkle resistance as well as flame retardance to cellulosic textiles.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: September 7, 1976
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Jerry P. Moreau, Leon H. Chance, Gordon J. Boudreaux, George L. Drake, Jr.
  • Patent number: 3972924
    Abstract: Perfluoroalkyl iodide monomer and telomer ester adducts of diethyl vinylphosphonate were prepared by free radical addition. Iodine of these adducts was replaced by hydrogen, and derivatives of the reduced phosphonate adducts were prepared, which include phosphonic acids, acid chlorides, and aziridinyl phosphine oxides. The aziridinyl phosphine oxides are used to impart oil and water repellency to cellulosic textiles. The other derivatives are useful as chemical intermediates as well as potential foaming agents.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: August 3, 1976
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Jerry P. Moreau
  • Patent number: 3937724
    Abstract: Perfluoroalkyl iodide monomer and telomer ester adducts of diethyl vinylphosphonate were prepared by free radical addition. Iodine of these adducts was replaced by hydrogen, and derivatives of the reduced phosphonate adducts were prepared, which include phosphonic acids, acid chlorides, and aziridinyl phosphine oxides. The aziridinyl phosphine oxides are used to impart oil and water repellency to cellulosic textiles. The other derivatives are useful as chemical intermediates as well as potential foaming agents.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: February 10, 1976
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Jerry P. Moreau
  • Patent number: 3933944
    Abstract: Derivatives of dicarboxylic acids containing a phosphono group in the alpha and alpha prime position have been made. These have a wide variety of uses as intermediates. Specifically, one of the new compounds is useful in imparting wrinkle resistance as well as flame retardance to cellulosic textiles.
    Type: Grant
    Filed: December 4, 1972
    Date of Patent: January 20, 1976
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Jerry P. Moreau, Leon H. Chance, Gordon J. Boudreaux, George L. Drake, Jr.
  • Patent number: 3932123
    Abstract: Hexamethyl phosphorous triamide is reacted with cotton cellulose, thereby imparting flame retardancy and cationexchange properties to the cellulose.
    Type: Grant
    Filed: March 16, 1973
    Date of Patent: January 13, 1976
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Leon H. Chance, Armand B. Pepperman, Jr.
  • Patent number: T100601
    Abstract: The tetramethylol derivatives of 2,4-diamino-6(3,3,3-tribromo-1-propyl)-1,3,5-triazine and 2,4-diamino-6(3,3,3-trichloro-1-propyl)-1,3,5-triazine, namely: 2,4-bis[di(hydroxymethyl)amino]-6-(3,3,3-tribromo-1-propyl)-1,3,5-triazine and 2,4-bis[di(hydroxymethyl)amino]-6-(3,3,3-trichloro-1-propyl)-1,3,5-triazin e, respectively, were used in combination with colloidal antimony oxides and or water emulsifying agents and suitable solvent to impart durable flame-retardancy to cellulosic materials, protein fibers such as wool, and to blends of cellulosic materials and synthetic fibers, particularly to cotton textiles or textiles composed of blends of cotton and polyester. Afterglow was eliminated by the use of small amounts of reactive phosphorus compounds.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: May 5, 1981
    Inventors: Leon H. Chance, Judy D. Timpa, George L. Drake, Jr.