Patents by Inventor Frank F. Cesark

Frank F. Cesark 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).

  • Oxime ethers of 4,4'-bis(N,N-diethylamino)benzhydrol and pressure-sensitive recording systems containing them
    Patent number: 4435002
    Abstract: Compounds of the formula ##STR1## wherein R and R' are alkyl C.sub.1 -C.sub.4 are useful as color formers for pressure- and heat-sensitive copying materials.
    Type: Grant
    Filed: June 9, 1982
    Date of Patent: March 6, 1984
    Assignee: American Cyanamid Company
    Inventors: Frank F. Cesark, Daniel W. Thomas
  • Novel glycolic acid esters and amides of bis(p-disubstitutedaminophenyl)carbinol
    Patent number: 4403792
    Abstract: Glyolic acid esters and amides of bis(p-disubstitutedaminophenyl)carbinols are disclosed as color formers for use in transfer sets.
    Type: Grant
    Filed: March 26, 1982
    Date of Patent: September 13, 1983
    Assignee: American Cyanamid Company
    Inventors: Frank F. Cesark, Robert J. Manfre, Daniel W. Thomas
  • Oxime ethers of 4,4'-bis(N,N-diethylamino)benzhydrol and pressure-sensitive recording systems containing them
    Patent number: 4351956
    Abstract: Compounds of the formula: ##STR1## wherein R and R.sup.1 are alkyl C.sub.1 -C.sub.4 are useful as color formers for pressure- and heat-sensitive copying materials.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: September 28, 1982
    Assignee: American Cyanamid Company
    Inventors: Frank F. Cesark, Daniel W. Thomas
  • Glycolic acid esters and amides of bis(p-disubstitutedaminophenyl)carbinol
    Patent number: 4343939
    Abstract: Glyolic acid esters and amides of bis(p-disubstitutedaminophenyl)carbinols are disclosed as color formers for use in transfer sets.
    Type: Grant
    Filed: April 22, 1981
    Date of Patent: August 10, 1982
    Assignee: American Cyanamid Company
    Inventors: Frank F. Cesark, Robert J. Manfre, Daniel W. Thomas
  • Process for preparing triarylmethane dyes
    Patent number: 4321207
    Abstract: A process for the preparation of triphenylmethane compounds by oxidation using as the catalyst a mixture of vanadium and molybdenum in a solvent medium of acetic acid plus a cosolvent.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: March 23, 1982
    Assignee: American Cyanamid Company
    Inventor: Frank F. Cesark
  • Hydrosulfite-bleachable ketonimine dyes for paper
    Patent number: 4125557
    Abstract: Ketonimine dyes of the formula selected from: ##STR1## wherein X.crclbar. is a chloride, bromide, thiocyanate, sulfamate, formate, acetate, lactate, hydrogen sulfate or dihydrogen phosphate ion; and ##STR2## wherein Y is a sulfate or hydrogen phosphate ion are hydrosulfite bleachable dyes for paper.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: November 14, 1978
    Assignee: American Cyanamid Company
    Inventors: Frank F. Loffelman, Frank F. Cesark