Patents by Inventor Jean Choay

Jean Choay 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).

  • Patent number: 4168377
    Abstract: Mixed or simple heparin salt having a reduced amount of a selected metal ion alone or with another metal ion in a mixed heparin. A heparin salt having a reduced sodium content being essentially sodium free and having a selectively high calcium or other selected salt content. A process for making these heparin salts by reaction with the selected metal salt, including, optionally, dialysis or precipitation. A typical heparin salt is a calcium heparin essentially free of sodium (like containing less than about 1% by weight of sodium), or mixed calcium-sodium heparin with a limited, predetermined content of sodium. Drug compositions containing these heparin salts and a pharmaceutical carrier. The drugs made from these heparin salts are useful as anti-coagulants.
    Type: Grant
    Filed: April 10, 1974
    Date of Patent: September 18, 1979
    Assignee: Choay S.A.
    Inventors: Jean Choay, Jean Goulay, Jean-Louis Amiot
  • Patent number: 4158052
    Abstract: The invention pertains to drug oil-free compositions, notably aqueous injectable compositions acting as non-specific adjuvants to stimulate in a host the immunitary responses to different antigens. The active principle of these oil-free compositions is N-acetyl-muramyl-L-alanyl-D-isoglutamine.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: June 12, 1979
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Francoise Audibert, Louis Chedid, Pierre Lefrancier, Jean Choay, Edgar Lederer
  • Patent number: 4153684
    Abstract: The invention relates to new water-soluble agents which are effective as immunizing adjuvants. These adjuvant agents are the methyl, ethyl or propyl esters of 2-(2-acetamido-2-deoxy-3-O-D-glucopyranosyl)-D-propionyl-L-alanyl-D-isoglu tamine and of 2-(2-acetamido-2-deoxy-3-O-D-glucopyranosyl)-D-propionyl-L-alanyl-D-glutam ic acid, the 2-(2-acetamido-2-deoxy-3-O-D-glucopyranosyl)-D-propionyl-L-alanyl-D-(.alph a.-methylamide)-glutamic and 2-(2-acetamido-2-deoxy-3-O-D-glucopyranosyl)-D-propionyl-L-seryl-D-isoglut amine, the 2-(2-acetamido-2-deoxy-3-O-D-glucopyranosyl)-D-propionyl-L-seryl-D-glutami c acid and their derivatives. They are particularly useful to prepare adjuvant medicinal compositions, used for increasing the efficiency of vaccines.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: May 8, 1979
    Assignee: Agence Nationale de Valorisation de la Recherche (ANVAR)
    Inventors: Francoise Audibert, Louis Chedid, Pierre Lefrancier, Jean Choay, Edgar Lederer
  • Patent number: 4148877
    Abstract: A biologically active fraction of reduced toxicity or substantially free of it formed of components having molecular weights not exceeding 10,000-12,000, capable of stimulating in vivo the resistance to bacterial infections, is obtained from bacteria, more particularly Gram-negative bacteria.A process to that effect consists of subjecting a solution of an hydrosoluble crude bacterial extract to the action of an enzyme, such as DNase, which is capable of causing the irreversible detachment of the above said biologically active fraction from the hydrosoluble crude extract which can then be separated, such as by a filtration procedure, from the other components of the hydrosoluble crude extract. The latter can be obtained such as by the treatment of bacteria with a water-phenol mixture, preferably at a temperature above ambient, from about 60.degree. to about 70.degree. C., or by the action on bacteria of a detergent such as sodium dodecyl sulfate.
    Type: Grant
    Filed: December 21, 1976
    Date of Patent: April 10, 1979
    Assignee: Choay S. A.
    Inventors: Jean Choay, Mireille Sakouhi nee Cousin
  • Patent number: 4106992
    Abstract: An initial solution of crude urokinase especially of human origin, is subjected to exclusion chromatography by contact with a DEAE cellulose resin, following adjustment of the pH of the solution to a value of from 4 to 6, and of its conductivity to a value of from 15,000 to 25,000 micromhos. An effluent enriched in urokinase is collected. A urokinase, mixed with foreign proteins, especially pyrogens, is purified by a partial saturation of an aqueous solution of this mixture by ammonium sulphate to a value for which the precipitate formed would not entrain more than 5% of the total activity of urokinase of the initial solution. A supernatant liquid enriched in urokinase is collected . A complex of urokinase and heparin, urokinase heparinate, is made by reacting an enriched solution of urokinase with a solution of heparin. It has relative activities of 30,000 to 100,000 CTA units of urokinase for 100 Iu of heparin.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: August 15, 1978
    Assignee: Choay S.A.
    Inventors: Edmond G. Vairel, Jean Goulay, Jean Choay
  • Patent number: 4064007
    Abstract: Continuous cell lines of macrophages are provided by the in vitro action, on mammalian macrophages withdrawn in situ, of macrophage activating substances, which cause the removal by the macrophages of the other cells present in the cellular medium withdrawn. The macrophages thus isolated are then placed in a suitable culture medium, until the establishment of a continuous line of macrophages, then the macrophages established as a continuous line are cultured in the presence of a suitable activating substance and the supernatant liquid is collected from these cultures. This supernatant contains substances inhibiting the proliferation of the cells having a rapid rate of multiplication. This supernatant liquid is, if necessary, subjected to a purification process. The product is notably useful for inhibiting human tumor cells.
    Type: Grant
    Filed: March 2, 1976
    Date of Patent: December 20, 1977
    Assignee: Institut National de la Sante et de la Recherche Medicale
    Inventors: Jean Choay, Paul Trolard, Henri Lucien Febvre
  • Patent number: 4029767
    Abstract: The present invention relates to pharmaceutical compositions of stable urokinase-heparin complexes, wherein the urokinase is purified, and methods for use thereof.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: June 14, 1977
    Assignee: Choay S.A.
    Inventors: Edmond G. Vairel, Jean Goulay, Jean Choay
  • Patent number: 4007266
    Abstract: A pharmaceutical composition for the treatment of disorders in the formation or regeneration of the cutaneous connective tissue including disorders due to aging of the skin, which composition comprises a homogeneous mixture of vitamin B.sub.12 in an amount effective for the above treatment and a carrier vehicle therefor. The carrier vehicle is a fatty skin cream of a pH between about 4 and 7 which is non-oxidizing and non-reducing and is pharmaceutically acceptable for repeated applications to the skin over prolonged periods of time.
    Type: Grant
    Filed: February 26, 1975
    Date of Patent: February 8, 1977
    Assignee: Choay S.A.
    Inventor: Jean Choay
  • Patent number: 3996231
    Abstract: The derivatives have the general formula ##STR1## in which X is a hydrogen atom or a methyl, phenyl or benzyl group; Y is a carbon chain comprising 2 to 6 carbon atoms, saturated or unsaturated, unsubstituted or substituted by alkyl, alkoxyl or halogen groups, said chain including if necessary, instead and in place of an aliphatic link, a carbonyl or alcohol group; Z is constituted by a hydrogen atom or defines at least an alkyl, alkoxyl or halogen group fixed at any position of the quinolinyl nucleus. They have high anti-inflammatory and analgesic activities.
    Type: Grant
    Filed: July 11, 1974
    Date of Patent: December 7, 1976
    Assignee: Choay S.A.
    Inventors: Camille Georges Wermuth, Jean Choay
  • Patent number: 3968215
    Abstract: A drug having an anti-agglutinating effect on platelets and a hypocoagulating effect formed of an association of papaverine or a physiologically acceptable salt thereof with a thiosulphate of a physiologically acceptable metal.
    Type: Grant
    Filed: August 27, 1974
    Date of Patent: July 6, 1976
    Assignee: Choay S.A.
    Inventors: Claude Raby, Jean Choay