Patents by Inventor Alan J. Chalk

Alan J. Chalk 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 palladium catalyzed coupling of a diazonium salt with an olefinic bond
    Patent number: 5274171
    Abstract: A "one-pot" process for the palladium catalyzed coupling of a diazonium salt with an olefinic bond, in the aqueous medium in which the diazonium salt is made, by employing a carboxylic acid as a solvent. Arylacrylic acids and their esters, e.g. the cinnamates, can be produced at low catalyst concentration without first isolating the diazonium salt. The process is applied to the synthesis of 2-ethylhexyl p-methoxycinnamate.
    Type: Grant
    Filed: January 22, 1992
    Date of Patent: December 28, 1993
    Assignee: Givaudan-Roure Corporation
    Inventors: Alan J. Chalk, Joseph A. Virgilio, Laszlo Wertheimer, Theresa B. Wertheimer
  • Selective hydrogenation of olefins
    Patent number: 5118837
    Abstract: A modified ruthenium catalyst can be used to selectively hydrogenate an olefinic double bond in the presence of another olefinic double bond in the same or in a different molecule. Modifiers are selected from compounds containing trivalent nitrogen, trivalent phosphorus and divalent sulfur.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: June 2, 1992
    Assignee: Givaudan Corporation
    Inventors: Alan J. Chalk, Laszlo V. Wertheimer
  • 3-(3-propan-2-ylphenyl)butanal and 3-(3-propen-2-ylphenyl)butanal
    Patent number: 4910346
    Abstract: The novel odorants, 3-(3-propan-2-ylphenyl)butanal and 3-(3-propen-2-ylphenyl)butanal, are disclosed.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: March 20, 1990
    Assignee: Givaudan Corporation
    Inventor: Alan J. Chalk
  • Process for the rearrangement of epoxides
    Patent number: 4517386
    Abstract: Terminal epoxides, also known as alpha-epoxides or 1,2-epoxides, are rearranged predominantly to the corresponding aldehydes using a catalyst system consisting of lithium tetrafluoroborate in a polyether solvent.
    Type: Grant
    Filed: May 11, 1984
    Date of Patent: May 14, 1985
    Assignee: Givaudan Corporation
    Inventors: Richard E. Naipawer, Alan J. Chalk
  • Alkenoxy octadienes as odorants
    Patent number: 4515711
    Abstract: Alkenoxy octadienes and alkoxy octadienes and octanes are valuable fragrance materials.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: May 7, 1985
    Assignee: Givaudan Corporation
    Inventors: Alan J. Chalk, Kenneth L. Purzycki
  • Process for the catalytic synthesis of conjugated dienes from dialkylallylamines
    Patent number: 4467118
    Abstract: There is disclosed a novel process for converting allylic amines, having a hydrogen bonded to a carbon .delta. to the amino group, to a diene in the presence of a zero valent palladium phosphine complex and a weak acid. The process has been used to make novel compositions containing 7-methoxy-3,7-dimethyloctadienes which are useful as odorants and flavorants.
    Type: Grant
    Filed: March 3, 1982
    Date of Patent: August 21, 1984
    Assignee: Givaudan Corporation
    Inventors: Alan J. Chalk, Steven A. Magennis, Vasile S. Wertheimer, Richard E. Naipawer
  • Process for preparing a myrcenol, cis-ocimenol mixture substantially free of trans-ocimenol
    Patent number: 4266087
    Abstract: The instant invention provides a new and improved method of preparing the Diels Alder mixture of 3 and 4-(4-methyl-4-hydroxyamyl).DELTA..sup.3 -cyclohexenecarboxaldehyde from the readily available myrcene. The novel sequence includes a synthesis of a novel myrcenol, ocimenol intermediate which is substantially free of trans-ocimenol.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: May 5, 1981
    Assignee: Givaudan Corporation
    Inventors: Alan J. Chalk, Steven A. Magennis
  • Catalytic aromatic carbonate process
    Patent number: 4187242
    Abstract: Catalytic aromatic carbonate process which comprises contacting a phenol, carbon monoxide, an oxidant, a base, and a Group VIIIB element selected from ruthenium, rhodium, palladium, osmium, iridium or platinum. The resulting aromatic mono- and polycarbonates are useful in the preparation of polycarbonates or as polycarbonates, per se, respectfully, which can be molded or formed into films, sheets, fibers, laminates or reinforced plastics by conventional techniques.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: February 5, 1980
    Assignee: General Electric Company
    Inventor: Alan J. Chalk
  • Polyphenylene polymers and methods for making the same
    Patent number: 4108942
    Abstract: High temperature polymers are prepared by effecting reaction in the presence of an alkyl aluminum halide-titanium halide catalyst between a difunctional acetylene compound and a monofunctional acetylene compound. These polymers can be used for making composites with heat-resistant fibers, such as graphite fibers, glass fibers, etc., useful in airplane construction and in turbines.
    Type: Grant
    Filed: March 22, 1972
    Date of Patent: August 22, 1978
    Assignee: General Electric Company
    Inventors: Alan J. Chalk, Alfred R. Gilbert
  • Aromatic carbonates
    Patent number: 4096169
    Abstract: An aromatic carbonate process comprising contacting a phenol, carbon monoxide in the presence of a base, Group VIIIB element selected from ruthenium, rhodium, palladium, osmium, iridium or platinum having an oxidation state greater than zero. The resulting aromatic mono- and polycarbonates are useful in the preparation of polycarbonates or as polycarbonates, per se, respectively, which can be molded or formed into films, sheets, fibers, laminates or reinforced plastics by conventional techniques.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: June 20, 1978
    Assignee: General Electric Company
    Inventor: Alan J. Chalk
  • Process for the preparation of aryl substituted aldehydes, ketones and alcohols
    Patent number: 4070374
    Abstract: Upon reacting an alcohol having an olefinic double bond with an aryl bromide or iodide in the presence of a Paladium catalyst, there is provided either an aryl substituted aldehyde, ketone or olefinic alcohol.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: January 24, 1978
    Assignee: Givaudan Corporation
    Inventors: Alan J. Chalk, Steven A. Magennis