Patents by Inventor Andre Durand

Andre Durand 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).

  • CRYPTOGRAPHIC SYSTEM BASED ON REPRODUCIBLE RANDOM SEQUENCES
    Publication number: 20170295012
    Abstract: In order to have a completely secure cryptographic system, it has been looked for a system unconditionally secure as the One Time Pad, but without its key distribution problem. It is herein disclosed a cryptographic system, which implements a cryptographic process based on a random sequence generating process (1), generating a random key as long as the data to process, for a ciphering process (2) or a deciphering process (3). The random sequences generated by the random sequence generating process (1), being perfectly random, are perfectly reproducible for those who have the correct random-transfer maps (4) and seeds (5). Therefore, we have a very strong cryptographic system without the problem of the key distribution. It even allows to implement an unconditionally secure communication channel over a network. Such cryptographic system can be implemented on very different hardwares, even with limited computing power like smart cards.
    Type: Application
    Filed: September 14, 2014
    Publication date: October 12, 2017
    Inventor: Alexandre Andre DURAND
  • Cryptographic system based on reproducible random sequences
    Publication number: 20140270165
    Abstract: A cryptographic system implementing a cryptographic process based on a random sequence generating process (1) generating a random key, as long as the data to process, for a ciphering process (2) or a deciphering process (3). The random sequences generated by the random sequence generating process (1), being perfectly random, are perfectly reproducible for those who have the correct random-transfer maps (4) and seeds (5). Therefore, we have a very strong cryptographic system without the problem of the key distribution. It even allows to implement an unconditionally secure communication channel over a network. Such cryptographic system can be implemented on very different hardwares, even with limited computing power like smart cards.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventor: Alexandre Andre DURAND
  • 4-Acetoxy-2&agr;-benzoyloxy-5&bgr;,20-epoxy-1&bgr;,7&bgr;,10&bgr;-trihydroxy-9-oxo-11-taxen-13&agr;-yl(2R,3S)-3-t-butoxycarbonylamino-3-phenyl-2-hydroxypropionate trihydrate
    Patent number: 6197980
    Abstract: 4-acetoxy-2&agr;-benzoyloxy-5&bgr;, 20-epoxy-1&bgr;, 7&bgr;, 10&bgr;-trihydroxy-9-oxo-11-taxen-13&agr;-y1(2R,3S)-3-t-butoxycarbonylamino-3-phenyl-2-hydroxypropionate trihydrate obtained by a process of centrifugal partition chromatography.
    Type: Grant
    Filed: August 20, 1999
    Date of Patent: March 6, 2001
    Assignee: Rhone-Poulenc Rorer S.A.
    Inventors: André Durand, Alain Gerbaud, Rodolphe Margraff
  • Process for the purification of taxoids
    Patent number: 6008385
    Abstract: A method for purifying taxoids (Taxotere, 10-deacetylbaccatin III) by centrifugal partition chromatography.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: December 28, 1999
    Assignee: Rhone-Poulenc Rorer S.A.
    Inventors: Andre Durand, Alain Gerbaud, Rodolphe Margraff
  • Process for the purification of taxoids
    Patent number: 5723635
    Abstract: A method for purifying 10-deacetylbaccatin III by centrifugal partition chromatography with aliphatic ketone and water as solvent mixture.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: March 3, 1998
    Assignee: Rhone-Poulenc Rorer S.A.
    Inventors: Andre Durand, Alain Gerbaud, Rodolphe Margraff