Patents by Inventor Franz Etzweiler

Franz Etzweiler 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).

  • Cyclic compounds
    Patent number: 5525589
    Abstract: The present invention is concerned with novel odorant compositions which are characterized by a content of cyclic compounds of the formula ##STR1## From this group of compounds the compounds I' with the meanings b), d), f) and g) are novel compounds.
    Type: Grant
    Filed: February 18, 1994
    Date of Patent: June 11, 1996
    Assignee: Givaudan-Roure Corporation
    Inventors: Franz Etzweiler, Daniel Helmlinger
  • Acetyl-tri-and-tetramethyl-octahydronaphthalenes and fragrance compositions containing same
    Patent number: 5214160
    Abstract: The invention concerns novel odorants of formula I wherein R is hydrogen or methyl. ##STR1## The invention also concerns fragrance compositions containing I. Formula I is intended to particularly embrace as the racemates, (.+-.)-3.alpha.-acetyl-3.beta.,4.beta.,5,5-tetramethyl-2,3,4,4a.beta.,5,6, 7,8-octahydronapthalene and (.+-.)-3.alpha.-acetyl-4.beta.,5,5,-trimethyl-2,3.beta.,4,4a.beta.,5,6,7,8 -octahydronapthalene.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: May 25, 1993
    Assignee: Givaudan Corporation
    Inventors: Franz Etzweiler, Daniel Helmlinger, Cornelius Nussbaumer, Mario Pesaro
  • Apparatus for the admixing of gaseous or vaporous substances
    Patent number: 5198155
    Abstract: For admixing a gaseous substance, especially an odoriferous substance, into a gas stream. The gaseous substance is fed by means of a carrier gas (23) via a line (10) to a mixing chamber (1). The line contains at least one capillary (19), which is arranged in an advancing device (9) with two defined positions. In a first position the capillary extends through an opening (6), into the mixing chamber. In a second position the capillary opens outside of the mixing chamber in a suction removal space (25) surrounding the mixing chamber. Preferably the carrier gas is flowing continuously and suction removal means (26) are provided which remove the carrier gas together with the gaseous substance when the capillary opens in the suction removal space.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: March 30, 1993
    Assignee: Givaudan Corporation
    Inventors: Franz Etzweiler, Norbert Neuner-Jehle
  • Acetyl-tri-and-tetramethyl-octahydronaphthalenes and fragrance compositions containing same
    Patent number: 5180709
    Abstract: The invention concerns novel odorants of formula I wherein R is hydrogen or methyl. ##STR1## The invention also concerns fragrance compositions containing I. Formula I is intended to particularly embrace as the racemates, (.+-.)-3.alpha.-acetyl-3.beta.,4.beta.,5,5-tetramethyl-2,3,4,4a.beta.,5,6, 7,8-octahydronapthalene and (.+-.)-3.alpha.-acetyl-4.beta.,5,5-trimethyl-2,3.beta.,4,4a.beta.,5,6,7,8- octahydronapthalene.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: January 19, 1993
    Assignee: Givaudan-Roure Corporation
    Inventors: Franz Etzweiler, Daniel Helmlinger, Cornelius Nussbaumer, Mario Pesaro
  • Device for branching gas flows
    Patent number: 4954150
    Abstract: A device for branching gas flows, more particularly in a gas chromatography plant, the device having: an inlet branch connected to the output of a separating column; and two outlet branches which extend from a junction to subsequent parts of the plant, characterised in that one outlet branch is connected by way of a shutoff valve to a device producing a pressure lower than the pressure in the other outlet branch.
    Type: Grant
    Filed: October 7, 1988
    Date of Patent: September 4, 1990
    Assignee: Givaudan Corporation
    Inventor: Franz Etzweiler