Patents by Inventor Ching Y. Tseng

Ching Y. Tseng 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).

  • Process for the preparation of trans-.DELTA..sup.9 -isoambrettolide
    Patent number: 4064144
    Abstract: A process is described for producing trans-.DELTA..sup.9 -isoambrettolide from aleuritic acid in three reaction steps; first forming a dioxolane by treatment with an excess amount of an orthoformate or a dialkyl formamide dialkyl acetal; then forming the corresponding bengalene acid derivative by heating the dioxolane with acetic anhydride; and then cyclizing the resulting trans bengalene acid derivative by heating it, thereby yielding a high quality substantially pure or 100% pure trans-.DELTA..sup.9 -isoambrettolide.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: December 20, 1977
    Assignee: International Flavors & Fragrances Inc.
    Inventor: Ching Y. Tseng
  • Intermediate in the process for the preparation of trans-.DELTA..sup.9 -isoambrettolide
    Patent number: 4014902
    Abstract: A process is described for producing trans-.DELTA..sup.9 -isoambrettolide from aleuritic acid in three reaction steps; first forming a dioxolane by treatment with an excess amount of an orthoformate or a dialkyl formamide dialkyl acetal; then forming the corresponding bengalene acid derivative by heating the dioxolane with acetic anhydride; and then cyclizing the resulting trans bengalene acid derivative by heating it, thereby yielding a high quality substantially pure or 100% pure trans-.DELTA..sup.9 -isoambrettolide.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: March 29, 1977
    Assignee: International Flavors & Fragrances Inc.
    Inventor: Ching Y. Tseng
  • Flavoring with cis esters of 2-methyl-3-pentenoic acid
    Patent number: 4000327
    Abstract: Described is the use in berry fruit flavors of a synthetically-produced 6-carbon carboxylic acid ester-containing composition comprising as its major constituent a cis ester of 2-methyl-3-pentenoic acid having the structure: ##STR1## wherein R is one of ethyl, isobutyl or n-hexyl.
    Type: Grant
    Filed: May 9, 1975
    Date of Patent: December 28, 1976
    Assignee: International Flavors & Fragrances Inc.
    Inventors: Ching Y. Tseng, John B. Hall, Manfred Hugo Vock, Joaquin Vinals, Edward J. Shuster
  • Novel process for altering the organoleptic properties of tobacco using 2-methyl-4-pentenoic acid and the ethyl esters thereof
    Patent number: 3987803
    Abstract: Described is a process comprising adding to tobacco (for subsequent incorporation into smoking articles along with tobacco blend) an amount sufficient to alter the flavor or aroma of the tobacco of 2-methyl-4-pentenoic acid and/or ethyl-2-methyl-4-pentenoate.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: October 26, 1976
    Assignee: International Flavors & Fragrances Inc.
    Inventors: John B. Hall, Ching Y. Tseng, Manfred Hugo Vock, Joaquin Vinals, Edward J. Shuster
  • Flavoring compositions containing alkyl esters of 2-methyl-4-pentenoic acid
    Patent number: 3976801
    Abstract: Methods are described for adding 2-methyl-4-pentenoic acid and/or C.sub.2 -C.sub.6 alkyl esters thereof to foodstuffs, chewing gums or medicinal products in order to impart sweet, fruity, strawberry, winey-cognac, pineapple-like, pear, green and/or apple-like aromas and tastes; with cooked strawberry jam undertones to said foodstuffs, chewing gums or medicinal products.
    Type: Grant
    Filed: April 8, 1975
    Date of Patent: August 24, 1976
    Assignee: International Flavors & Fragrances Inc.
    Inventors: John B. Hall, Ching Y. Tseng, Manfred Hugo Vock, Joaquin Vinals, Edward J. Shuster
  • Alkyl esters of 2-methyl-4-pentenoic acid
    Patent number: 3966799
    Abstract: Methods are described for adding the novel compounds, isobutyl and n-hexyl esters of 2-methyl-4-pentenoic acid to foodstuffs, chewing gums or medicinal products in order to impart sweet, fruity, strawberry, pineapple-like, pear and/or green aromas and tastes.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: June 29, 1976
    Assignee: International Flavors & Fragrances Inc.
    Inventors: John B. Hall, Ching Y. Tseng, Manfred Hugo Vock, Joaquin Vinals, Edward J. Shuster
  • Processes for producing cis alkyl-2-methyl-3-pentenoates and isomer mixtures containing high proportions of cis alkyl-2-methyl-3-pentenoates
    Patent number: 3931293
    Abstract: Methods for producing cis-alkyl-2-methyl-3-pentenoates and isomeric mixtures containing high proportions (greater than 50%) of cis C.sub.2 -C.sub.6 alkyl-2-methyl-3-pentenoates.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: January 6, 1976
    Assignee: International Flavors & Fragrances Inc.
    Inventors: Ching Y. Tseng, John B. Hall, Manfred Hugo Vock, Joaquin F. Vinals, Edward J. Shuster