Plural Chalcogens Bonded Directly To Ring Carbons Of The Five-membered Hetero Ring (e.g., Imides, Etc.) Patents (Class 548/513)
  • Patent number: 4596826
    Abstract: Described herein are novel carboxylic acid amide compounds or carboximide compounds represented by the general formula: ##STR1## wherein Z represents a group of the formula (1) or (2): ##STR2## wherein R.sup.1 and R.sup.2 are hydrogen atom or methyl group, respectively; Xs, which may be the same or different, are hydrogen atom, a lower alkyl, lower alkoxy, halo, or alkyl halide group, respectively, and n represents an integer of 0 to 2, and their pharmaceutically acceptable salts; process for the production thereof; and medicines containing the same. The novel compounds are useful as treating, preventing and improving agents for diseases attended with cerebral dysfunction as well as various symptoms caused by the said diseases. Further, the compounds are useful for the improvement of neurosis of the stomach; and treatment and prevention for various constipation.
    Type: Grant
    Filed: June 12, 1984
    Date of Patent: June 24, 1986
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuji Harigaya, Hiroo Ogura, Mitsuo Mihara, Motosuke Yamanaka, Kiyomi Yamatsu
  • Patent number: 4595409
    Abstract: A compound of the formula: ##STR1## wherein R.sub.1 is a hydrogen atom, a fluorine atom or a methyl group and R.sub.2 is a C.sub.1 -C.sub.3 alkyl group, a C.sub.1 -C.sub.5 alkoxy group, a chloro(C.sub.2 -C.sub.4)alkoxy group, a dichloro(C.sub.2 -C.sub.4)alkoxy group, a cyclo(C.sub.3 -C.sub.7)alkoxy group, a phenoxy group, a C.sub.1 -C.sub.5 alkylthio group or a di(C.sub.1 -C.sub.5)alkylamino group, which is useful as a herbicide.
    Type: Grant
    Filed: August 8, 1984
    Date of Patent: June 17, 1986
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Toru Haga, Eiki Nagano, Ryo Yoshida, Shunichi Hashimoto
  • Patent number: 4594099
    Abstract: New herbicidal N-substituted-.DELTA..sup.
    Type: Grant
    Filed: October 11, 1983
    Date of Patent: June 10, 1986
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Osamu Yamada, Mikio Yanagi, Fumio Futatsuya, Kenji Kobayashi
  • Patent number: 4588786
    Abstract: A process for producing a water-soluble dicarboxylic acid imide compound which comprises adding a primary amine compound to an aqueous solution of a water-soluble salt of a dicarboxylic acid compound containing at least one dicarboxylic acid unit capable of forming a 5-membered cyclic acid imide linkage and heating the mixture to introduce an acid imide linkage into the molecule.
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: May 13, 1986
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Hiromitsu Kadono, Tadao Natsuume
  • Patent number: 4563535
    Abstract: A compound of the formula: ##STR1## wherein R is an isoproyl group or an n-amyloxycarbonylmethyl group, useful as a herbicide, is effectively produced by reacting a compound of the formula: ##STR2## wherein R is as defined above, with sulfuryl chloride or chlorine in a solvent in the presence of a dehydrohalogenating agent.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: January 7, 1986
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventor: Ichiki Takemoto
  • Patent number: 4537897
    Abstract: Novel 3-(1,2-propadienyl)-cyclopropane-carboxylates of the formula ##STR1## wherein R is alcohol used in pyrethrinoid synthesis, X and Y are both hydrogen or individually halogen or X is hydrogen or halogen and Y is alkyl of 1 to 18 carbon atoms or halogen or X is hydrogen or halogen or alkyl of 1 to 18 carbon atoms and Y is --COOR' or --CN or ##STR2## R' is alkyl of 1 to 18 carbon atoms, R.sub.2 and R.sub.3 are individually hydrogen or alkyl of 1 to 18 carbon atoms or R.sub.2 and R.sub.3 together with the nitrogen atom form a heterocycle having pesticidal properties.
    Type: Grant
    Filed: September 15, 1983
    Date of Patent: August 27, 1985
    Assignee: Roussel Uclaf
    Inventors: Jean Tessier, Jean-Pierre Demoute, Joseph Cadiergue
  • Patent number: 4536209
    Abstract: .DELTA.'-Tetrahydrophthalimides having a substituted oxy group at 3-position and, if necessary, a halogen atom at 4-position and/or at 2-position of phenyl group as N-substituent have excellent herbicidal activity and are useful as selective herbicides.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: August 20, 1985
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Tetsuo Jikihara, Masatsugu Oda, Bunji Natsume, Hisao Watanabe, Seiichi Suzuki
  • Patent number: 4529599
    Abstract: Carboxylate esters of the formula (I):R.sub.1 --COOR.sub.2wherein R.sub.1 is a tricyclodecyl or tricycloundecyl group, and R.sub.2 is a group of the formula ##STR1## wherein R.sub.3 is hydrogen or a cyano group; ##STR2## wherein R.sub.3 is a hydrogen or a cyano group; ##STR3## which are useful as insecticides.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: July 16, 1985
    Assignee: Kao Corporation
    Inventor: Shoji Nakagawa
  • Patent number: 4528396
    Abstract: Novel cyclic di- and tetraester compounds made from the reaction of various unsaturated cyclic compounds with carboxylic acid anhydrides in the presence of oxygen are described. The process to make these novel ester compounds is preferably conducted at a temperature in the range from about 50.degree. to 150.degree. C. and in the presence of a catalyst. A transition metal borate catalyst is preferred. Such ester compounds are potentially useful plasticizers, lubricants, solvents and fuel additives.
    Type: Grant
    Filed: September 24, 1982
    Date of Patent: July 9, 1985
    Assignee: Texaco Inc.
    Inventors: John R. Sanderson, Lewis W. Watts, Jr.
  • Patent number: 4518797
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 is an acyl group or certain optionally halo-substituted hydrocarbyl groups, and X is --CH.sub.2 CH(OCH.sub.3).sub.2, --CH.sub.2 CHO, --CH.dbd.CHOR.sup.2 in which R.sup.2 is acyl, --CHO,--C(O)Cl, --C(O)Br or --C(O)OR in which R is H, a salt-forming cation, an alkyl group or the residue of a pyrethroid alcohol are new pesticides or intermediates therefore. The compounds are prepared using a multi-step synthesis starting from the natural terpene, 3-carene.
    Type: Grant
    Filed: March 15, 1979
    Date of Patent: May 21, 1985
    Assignee: Shell Oil Company
    Inventor: Steven A. Roman
  • Patent number: 4489093
    Abstract: Novel esters in all possible isomeric forms of the formula ##STR1## wherein R is selected from the group consisting of (a) optionally unsaturated alkyl of 1 to 8 carbon atoms and optionally unsaturated cycloalkyl or cycloalkyl-alkyl of 3 to 8 carbon atoms optionally substituted with at least one member of the group consisting of halogen, ##STR2## aryl optionally substituted with at least one member of the group consisting of --OH, alkoxy of 1 to 8 carbon atoms, alkyl of 1 to 8 carbon atoms, halogen, ##STR3## R' is alkyl of 1 to 8 carbon atoms, R" and R"' are individually selected from the group consisting of hydrogen and alkyl of 1 to 8 carbon atoms, AlK.sub.1, AlK.sub.2 and AlK.sub.3 are individually alkyl of 1 to 18 carbon atoms (b) aryl of 6 to 14 carbon atoms optionally substituted with at least one substituent selected from the group consisting of --OH, alkoxy of 1 to 8 carbon atoms, alkyl of 1 to 8 carbon atoms, halogen, --OCF.sub.3, --CF.sub.3 and --SCF.sub.
    Type: Grant
    Filed: May 17, 1983
    Date of Patent: December 18, 1984
    Assignee: Roussel Uclaf
    Inventors: Jacques Martel, Jean Tessier, Andre Teche
  • Patent number: 4484940
    Abstract: A compound of the formula: ##STR1## wherein X is a chlorine atom or a bromine atom and R is a C.sub.1 -C.sub.8 alkyl group except isopropyl, which is useful as a herbicide.
    Type: Grant
    Filed: March 23, 1982
    Date of Patent: November 27, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Eiki Nagano, Shunichi Hashimoto, Ryo Yoshida, Hiroshi Matsumoto, Katsuzo Kamoshita
  • Patent number: 4484941
    Abstract: A compound of the formula: ##STR1## wherein X is a chlorine atom or a bromine atom and R is a C.sub.3 -C.sub.4 alkenyl group or a C.sub.3 -C.sub.4 alkynyl group, which is useful as a herbicide.
    Type: Grant
    Filed: March 23, 1982
    Date of Patent: November 27, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Eiki Nagano, Shunichi Hashimoto, Ryo Yoshida, Hiroshi Matsumoto, Katsuzo Kamoshita
  • Patent number: 4480118
    Abstract: This invention relates to a novel carboxylic acid ester represented by the following general formula (I) and an insecticidal and/or acaricidal composition containing the same as an active ingredient: ##STR1## wherein X is represented by the formula, ##STR2## and further also relates to a carboxylic acid or a reactive derivative thereof represented by the general formula, ##STR3## wherein R.sub.16 is hydroxy group, chlorine or bromine atom, or a C.sub.1-2 alkoxy group, W is oxygen atom or --CH.sub.2 -- group, k is an integer of 0 or 1, E is hydrogen, chlorine, fluorine or bromine atom, and n is an integer of 1 to 4.
    Type: Grant
    Filed: December 30, 1981
    Date of Patent: October 30, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kazunori Tsushima, Noritada Matsuo, Makoto Hatakoshi, Toshihiko Yano, Nobushige Itaya
  • Patent number: 4474968
    Abstract: Racemic mixtures and optically active isomers of (.alpha.S-5S)-.alpha.-amino-3-chloro-.alpha.-isoxazoline-5-acetic acid (AT-125). Provides process for preparing AT-125 and its analogs and intermediates used in the process.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: October 2, 1984
    Assignee: The Upjohn Company
    Inventor: Robert C. Kelly
  • Patent number: 4468521
    Abstract: Novel .gamma.-lactone derivatives are provided. These lactone derivatives, when reacted with hydrogen halide in alcohol, yield .gamma.-halogeno-.delta.-unsaturated carboxylic acid esters. This ring-opening process is useful for the purpose of increasing the yield of pyrethrin analogs which are of value as insecticides and agricultural chemicals. Thus, the .gamma.-lactone derivatives by-produced in the production process for dihalogenovinyl chrysanthemumates are caused to undergo ring-opening reaction to yield the corresponding .gamma.-halogeno-.delta.-unsaturated carboxylic acid esters which are important intermediates for said pyrethrin analogs.
    Type: Grant
    Filed: February 22, 1982
    Date of Patent: August 28, 1984
    Assignee: Kuraray Co., Ltd.
    Inventors: Mori Fumio, Omura Toshiaki, Nishida Takashi, Itoi Kazuo
  • Patent number: 4467100
    Abstract: Imide-amides having the structure ##STR1## wherein ##STR2## are certain cycloaliphatic or aromatic groups and R and R individually are hydrogen, halogen, an alkyl group having from 1 to 4 carbon atoms, hydroxy, carboxyl, and amine and when taken together represent ##STR3## wherein R.sup.2 is the same as R and R.sup.1, have been found to provide cured epoxy resin systems characterized by high temperature stability and excellent mechanical and physical properties.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: August 21, 1984
    Assignee: Lord Corporation
    Inventors: Raj N. Gounder, John T. Geary
  • Patent number: 4458084
    Abstract: Racemic mixtures and optically active isomers of (.alpha.S-5S)-.alpha.-amino-3-chloro-.alpha.-isoxazoline-5-acetic acid (AT-125). Provides process for preparing AT-125 and its analogs and intermediates used in the process.This case is a continuation of Ser. No. 906,175 filed May 15, 1978, now abandoned.
    Type: Grant
    Filed: November 14, 1981
    Date of Patent: July 3, 1984
    Assignee: The Upjohn Company
    Inventor: Robert C. Kelly
  • Patent number: 4458089
    Abstract: Racemic mixtures and optically active isomers of (.alpha.S-5S)-.alpha.-amino-3-chloro-.alpha.-isoxazoline-5-acetic acid (AT-125). Provides process for preparing AT-125 and its analogs and intermediates used in the process.This case is a continuation of Ser. No. 906,175 filed May 15, 1978, now abandoned.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: July 3, 1984
    Assignee: The Upjohn Company
    Inventor: Robert C. Kelly
  • Patent number: 4458083
    Abstract: Racemic mixtures and optically active isomers of (.alpha.S-5S)-.alpha.-amino-3-chloro-.alpha.-isoxazoline-5-acetic acid (AT-125). Provides process for preparing AT-125 and its analogs and intermediates used in the process.This case is a continuation of Ser. No. 906,175 filed May 15, 1978, now abandoned.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: July 3, 1984
    Assignee: The Upjohn Company
    Inventor: Robert C. Kelly
  • Patent number: 4439230
    Abstract: Oxime derivatives of the following formula are described: ##STR1## wherein R.sub.1 is hydrogen or halogen, and R.sub.8 is phthalimido, 4, 5, 6, 7-tetrahydrophthalimido or 3a, 4, 7, 7a-tetrahydrophthalimido attached at the nitrogen atom to the remainder of the molecule. These compounds are used for protecting plant crops from the action of aggressive agricultural chemicals.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: March 27, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Werner Fory, Henry Martin, Georg Pissiotas
  • Patent number: 4439229
    Abstract: Compounds of the formula: ##STR1## wherein A is O or S, halo is chloro, bromo or fluoro; X' is --CH.sub.2 --, O or S; X is hydrogen or halo; R.sup.1 and R.sup.2 are the same or different radicals selected from hydrogen or lower alkyl; and Z can be a variety of substituents and agronomically acceptable salts, esters and amides as well as other heterocyclic benzenes are disclosed as selective herbicides.
    Type: Grant
    Filed: May 6, 1982
    Date of Patent: March 27, 1984
    Assignee: Rohm and Haas Company
    Inventor: Colin Swithenbank
  • Patent number: 4437879
    Abstract: Oxime derivatives of the formula (I) ##STR1## wherein n is 0, 1 or 2 and m is 0 or 1, andAr is a phenyl radical ##STR2## a naphthyl radical substituted by R.sub.2 and R.sub.3, a 5- to 10-membered heterocyclic radical which contains not more than 3 identical or different heteroatoms N, O and/or S and which is substituted by R.sub.2, R.sub.3 and R.sub.4 and can be substituted by oxo or thiono, or if m is O, Ar is a radical R--CO, wherein R is a radical --OR.sub.5, in which R.sub.5 is an aliphatic group containing not more than 8 carbon atoms or is an araliphatic group containing not more than 15 carbon atoms or is a cycloaliphatic or aromatic group, each containing not more than 10 carbon atoms, while the possible substituents of the aromatic radicals or of the cycloaliphatic radical are halogen, --CN, --NO.sub.2, lower alkyl, lower alkoxy, haloalkyl; or R is a radical --NH--CO--NH--R.sub.7 or a radical --N(R.sub.6)(R.sub.7), wherein R.sub.6 is hydrogen or lower alkyl and R.sub.
    Type: Grant
    Filed: July 14, 1982
    Date of Patent: March 20, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: Werner Fory, Henry Martin, Georg Pissiotas
  • Patent number: 4431668
    Abstract: Cyclopropane carboxylic acid ester derivatives and optical and geometrical isomers thereof expressed by the general formula: ##STR1## wherein R.sub.1 represents hydrogen atom or methyl group, R.sub.2 represents alkyl group, alkenyl group, haloalkyl group, haloalkenyl group having 1-6 carbon atoms and a group selected from the groups of the general formulae (II), (III) and (IV): ##STR2## in which n is an integer of 2-5, R.sub.4 represents methyl group, chlorine atom or methoxy group, and R.sub.3 represents a group selected from the groups of the general formulae (V), (VI), (VII), (VIII), (IX) and (X): ##STR3## in which X represents oxygen atom or vinylene group, R.sub.5 represents allyl group, propargyl group, benzyl group, phenoxy group or 2,2-dichlorovinyloxy group, R.sub.6 represents hydrogen atom, methyl group or halogen atom, R.sub.7 represents hydrogen atom, cyano group, ethynyl group or trifluoromethyl group and m is an integer of 1-2, R.sub.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: February 14, 1984
    Assignee: Dainippon Jochugiku Kabushiki Kaisha
    Inventors: Yoshio Katsuda, Yoshihiro Minamite
  • Patent number: 4431822
    Abstract: A compound of the formula: ##STR1## wherein X is a chlorine atom or a bromine atom, which is useful as a herbicide.
    Type: Grant
    Filed: March 23, 1982
    Date of Patent: February 14, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Eiki Nagano, Shunichi Hashimoto, Ryo Yoshida, Hiromichi Oshio, Katsuzo Kamoshita
  • Patent number: 4423064
    Abstract: This invention relates to novel ester compounds derived from alkynoic acids and to their preparation. This invention is also directed to insecticidal and miticidal compositions comprising an acceptable carrier and an insecticidally or miticidally effective amount of a novel ester compound of this invention as well as a method of controlling pests by subjecting them to an insecticidally or miticidally effective amount of a novel ester compound of this invention.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: December 27, 1983
    Assignee: Union Carbide Corporation
    Inventor: Thomas N. Wheeler
  • Patent number: 4420327
    Abstract: .DELTA.'-Tetrahydrophthalimides having a substituted oxy group at 3-position and a halogen atom at 4-position if necessary, a halogen atom at 2-position of phenyl group as N-substituent have excellent herbicidal activity and are useful as selective herbicides.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: December 13, 1983
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Tetsuo Jikihara, Masatsugu Oda, Kazuyuki Ushinohama, Hisao Watanabe, Seiichi Suzuki
  • Patent number: 4411912
    Abstract: Esters and thiolesters of amino acids, intermediates therefor, synthesis thereof, and the use of said esters and thiolesters and compositions for the control of pests.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: October 25, 1983
    Assignee: Zoecon Corporation
    Inventors: Clive A. Henrick, Barbara A. Garcia
  • Patent number: 4409018
    Abstract: Novel compounds of the formula ##STR1## wherein R is a halogen, Q is hydrogen, a substituted or unsubstituted hydrocarbon, ##STR2## (wherein R.sub.1 is a substituted or unsubstituted hydrocarbon or ##STR3## R.sub.2 is hydrogen or a substituted or unsubstituted hydrocarbon, R.sub.3 is a substituted or unsubstituted hydrocarbon, R.sub.4 is a lower alkyl group, X is oxygen or an imino group which may be substituted by a lower alkyl, and each of Y and Z is oxygen or sulfur); which are useful as herbicides.
    Type: Grant
    Filed: May 28, 1981
    Date of Patent: October 11, 1983
    Assignee: Takeda Chemical Industries, Ltd.
    Inventor: Yasuo Ishida
  • Patent number: 4375433
    Abstract: Disclosed is a process for preparing the antibiotic 6-hydroxymethyl-2-(.beta.-aminoethylthio)-1-carbadethiapen-2-em-3-carboxyl ic acid (I) ##STR1## and its pharmaceutically acceptable salt and ester derivatives. An intermediate for the production of these compounds are compounds of the formula ##STR2## wherein R.sup.5 and R are readily removable protecting groups.
    Type: Grant
    Filed: September 12, 1980
    Date of Patent: March 1, 1983
    Assignee: Merck & Co., Inc.
    Inventors: David G. Melillo, Kenneth M. Ryan
  • Patent number: 4361576
    Abstract: Cyclobutanecarboxylic acid imides of the formula I ##STR1## wherein one of R.sub.1 and R.sub.6 is hydrogen, methyl or ethyl, and the other is methyl or ethyl, R.sub.2 and R.sub.3 independently of one another are each hydrogen, fluorine or methyl, or R.sub.2 is acetoxy or chlorine while R.sub.3 is hydrogen, and wherein R.sub.4 is hydrogen, methyl or chlorine, and R.sub.5 is hydrogen or methyl, whereby R.sub.3 and R.sub.4 together can also form an additional bond in the four-membered ring, are suitable for combating various fungi and have a particularly excellent action against Botrytis. They can be produced in an especially advantageous manner by photochemical [2+2] cycloaddition of alkenes or alkines with for example appropriately substituted maleic acid-(3,5-dichlorophenyl)-imides.
    Type: Grant
    Filed: October 29, 1980
    Date of Patent: November 30, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Niklaus Buhler, Marcus Baumann, Daniel Bellus, Elmar Sturm
  • Patent number: 4339383
    Abstract: The invention relates to alkanolamido-.beta.-carboxylic acid esters of the formula I ##STR1## A full definition of the above formula will be found in claim 1 of the specification. These compounds are useful stabilizers for chlorinated thermoplastics.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: July 13, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Wolfgang Wehner, Klaus-Peter Michaelis, Rainer Schneider
  • Patent number: 4332815
    Abstract: Perhaloalkylvinylcyclopropanecarboxylates having the general formula ##STR1## are disclosed wherein one of Y and Z is a perhaloalkyl group. Compounds in which R is hydroxy, halogen or lower alkoxy are novel intermediates for preparation of insecticidal esters in which R is --OR.sup.1 where R.sup.1 is a wide variety of alcohol residues. The insecticidal efficacy and preparation of the compounds and intermediates therefor are described and exemplified.
    Type: Grant
    Filed: July 1, 1980
    Date of Patent: June 1, 1982
    Assignee: FMC Corporation
    Inventor: John F. Engel
  • Patent number: 4328237
    Abstract: Pyrethroid type insecticides are described having the formula: ##STR1## Compounds of general formula I are endowed with a high insecticide and acaricide activity.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: May 4, 1982
    Assignee: Montedison S.p.A.
    Inventors: Paolo Piccardi, Francesco Corda, Franco Gozzo, Augusto Menconi, Angelo Longoni
  • Patent number: 4328167
    Abstract: A novel process for the preparation of optically active alcohols of the formula ##STR1## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of hydrogen, saturated and unsaturated, optionally substituted aliphatic, cycloaliphatic, aromatic and heterocyclic, with the proviso that at least one of R.sub.1 and R.sub.2 is other than hydrogen, and R.sub.1 and R.sub.2 taken together with the carbon atom to which they are attached form a hydrocarbon ring comprising reacting an ester of an optically active alcohol of the formula ##STR2## wherein A is the organic radical of a chiral carboxylic acid of the formula ##STR3## with a boron halide and reacting the resulting mixture with water to obtain the optically active isomer of the alcohol of formula I with the same configuration of the alcohol moiety of the starting ester in high yields without by-products of known processes.
    Type: Grant
    Filed: June 2, 1980
    Date of Patent: May 4, 1982
    Assignee: Roussel Uclaf
    Inventors: Jacques Martel, Jean Tessier, Jean-Pierre DeMoute