Patents by Inventor Sandra I. Graham

Sandra I. Graham 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).

  • Oil well acidizing with iron chelating derivatives of aldohexoses and aldopentoses such as a salt or acid of 2-ketogluconate
    Patent number: 5293942
    Abstract: This invention relates to the use of certain keto and diketo acids, esters and salts that are derived from aldopentoses and aldohexoses, to maintain very high levels of iron in solution under oil well acidizing conditions. The compounds described herein chelate ferric iron at low temperatures and are activated by heat to reduce ferric iron to the more soluble ferrous species at high temperatures. Because of these properties and their extraordinarily high solubility in hydrochloric acid, such compounds are capable of maintaining considerably more iron in solution than competing materials.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: March 15, 1994
    Assignee: Pfizer Inc.
    Inventors: Herman L. Gewanter, Sandra I. Graham, Joseph M. Rashan, Jr., R. Larry Reitz
  • Radiation curable compositions
    Patent number: 4277319
    Abstract: N-Substituted acryloyloxyethyl amines are useful both as radiation curable coating materials and as cure accelerators in coating formulations. The amines are prepared by one of several methods including transesterification of acrylate esters with an N-substituted hydroxyethylamine or acrylation of the N-substituted hydroxyethylamine.
    Type: Grant
    Filed: April 22, 1976
    Date of Patent: July 7, 1981
    Assignee: Rohm and Haas Company
    Inventors: Kayson Nyi, Sandra I. Graham
  • Curing photopolymerizable compositions containing n-substituted acryloyloxyethyl amines
    Patent number: 4115232
    Abstract: N-Substituted acryloyloxyethyl amines are useful both as radiation curable coating materials and as cure accelerators in coating formulations. The amines are prepared by one of several methods including transesterification of acrylate esters with an N-substituted hydroxyethylamine or acrylation of the N-substituted hydroxyethylamine.
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: September 19, 1978
    Assignee: Rohm and Haas Company
    Inventors: Kayson Nyi, Sandra I. Graham
  • Acrylic acid esters
    Patent number: 4001304
    Abstract: N-Substituted acryloyloxyethyl amines are useful both as radiation curable coating materials and as cure accelerators in coating formulations. The amines are prepared by one of several methods including transesterification of acrylate esters with an N-substituted hydroxyethylamine or acrylation of the N-substituted hydroxyethylamine.
    Type: Grant
    Filed: May 2, 1974
    Date of Patent: January 4, 1977
    Assignee: Rohm and Haas Company
    Inventors: Kayson Nyi, Sandra I. Graham