Patents by Inventor Louis Bertschi

Louis Bertschi 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).

  • Device for olfactory judgment of an odorous substance, use thereof and a method of operating the device
    Patent number: 6467332
    Abstract: A device for olfactory judgement of an odorous substance, particularly a perfume, substantially comprising a flat test object in a casing, preheated or heated electrically by a temperature control and measuring circuit to a given temperature and with prolonged heat storage means, on which an easily attachable and removable material is disposed and is covered with the odorous substance for judgement, the device also comprising a fan, wherein in the casing (2) the odorous substance can be applied to a sample strip (14) connected via a sample holder (12) to a heatable metal base carrier (7) movable in one direction (P), and the base carrier (7) is disposed at one end of an air flow duct (6) formed by a pipe (5), particularly a square pipe (5) open at both ends, a fan (18) being disposed at the other end and adapted, by means of an associated motor (17), to convey air from the end near the fan, via the sample strip (14) to the other end of the air flow duct (6), so that a starting air flow (34a), a received air f
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: October 22, 2002
    Assignee: Givaudan SA
    Inventors: Louis Bertschi, Rolf Schwarzenbach