Patents by Inventor Peter de Vries

Peter de Vries 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).

  • Enzyme system comprising ferulic acid esterase from Aspergillus
    Patent number: 6143543
    Abstract: An enzyme system is described that is useful for preparing food and feed. One enzyme of that system is obtainable from Aspergillus. That enzyme has the following characteristics: a MW of from 29 kDa to 36 kDa as measured on a SDS-Phastgel (10-15%) or about 30 kDa; a pI value of about 3-4; ferulic acid esterase activity; a pH optimum of about 5; and a temperature optimum of from about 50 to about 60.degree. C.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: November 7, 2000
    Assignee: Danisco A/S
    Inventors: Birgit Michelsen, Ronald Peter De Vries, Jacob Visser, J.o slashed.rn Borch S.o slashed.e, Charlotte Horsmans Poulsen, Masoud R. Zargahi
  • Display device and display unit for use therein
    Patent number: 4003149
    Abstract: A display device consists of rows and columns of display units each capable of either an illuminated or a dark condition whereby selection of suitable units for illumination can form a display character. The character can be caused to progress along the device by connecting the units in two groups of alternate units and by energizing these groups alternately to cause each unit momentarily to assume a master relationship towards the next downstream unit and hence transfers its state of illumination to such downstream unit. Energization is pneumatic, each unit containing a shutter that acts, when moved between two positions, both to change the state of such unit and as a valve controlling air flow to the next downstream unit.
    Type: Grant
    Filed: November 26, 1974
    Date of Patent: January 18, 1977
    Inventor: Peter de Vries