BE493228A - - Google Patents

Info

Publication number
BE493228A
BE493228A BE493228DA BE493228A BE 493228 A BE493228 A BE 493228A BE 493228D A BE493228D A BE 493228DA BE 493228 A BE493228 A BE 493228A
Authority
BE
Belgium
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of BE493228A publication Critical patent/BE493228A/xx
Priority claimed from US97786A external-priority patent/US2558733A/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/70—Material containing nitrile groups
    • D06P3/702—Material containing nitrile groups dyeing of material in the gel state
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D1/00—Treatment of filament-forming or like material
    • D01D1/06—Feeding liquid to the spinning head
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/06—Wet spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/12—Stretch-spinning methods
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/22—Formation of filaments, threads, or the like with a crimped or curled structure; with a special structure to simulate wool
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/223—Stretching in a liquid bath
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S260/00—Chemistry of carbon compounds
    • Y10S260/15—Antistatic agents not otherwise provided for
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S260/00—Chemistry of carbon compounds
    • Y10S260/15—Antistatic agents not otherwise provided for
    • Y10S260/19—Non-high polymeric antistatic agents/n
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S260/00—Chemistry of carbon compounds
    • Y10S260/15—Antistatic agents not otherwise provided for
    • Y10S260/19—Non-high polymeric antistatic agents/n
    • Y10S260/20—Antistatic agent contains pentavalent nitrogen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/017—Filament stretching apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Coloring (AREA)
BE493228D 1947-09-04 BE493228A (uk)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US772200A US2558730A (en) 1947-09-04 1947-09-04 Method of preparing shaped products from polymers and copolymers of acrylonitrile
US6837048A 1948-12-30 1948-12-30
US97786A US2558733A (en) 1949-06-08 1949-06-08 Method of producing synthetic fibers from polymers and copolymers of acrylonitrile
US146880A US2558734A (en) 1947-09-04 1950-02-28 Thread-treating apparatus
US212929A US2614289A (en) 1947-09-04 1951-02-27 Fiber-forming apparatus
US715915XA 1951-03-08 1951-03-08

Publications (1)

Publication Number Publication Date
BE493228A true BE493228A (uk)

Family

ID=32234493

Family Applications (5)

Application Number Title Priority Date Filing Date
BE492595D BE492595A (uk) 1947-09-04
BE493893D BE493893A (uk) 1947-09-04
BE487570D BE487570A (uk) 1947-09-04
BE492596D BE492596A (uk) 1947-09-04
BE493228D BE493228A (uk) 1947-09-04

Family Applications Before (4)

Application Number Title Priority Date Filing Date
BE492595D BE492595A (uk) 1947-09-04
BE493893D BE493893A (uk) 1947-09-04
BE487570D BE487570A (uk) 1947-09-04
BE492596D BE492596A (uk) 1947-09-04

Country Status (6)

Country Link
US (3) US2558730A (uk)
BE (5) BE493228A (uk)
CH (3) CH292747A (uk)
DE (1) DE940670C (uk)
FR (6) FR980700A (uk)
GB (9) GB672775A (uk)

Families Citing this family (107)

* Cited by examiner, † Cited by third party
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US2644803A (en) * 1949-02-15 1953-07-07 American Cyanamid Co Spinning solutions comprising an acrylonitrile-allyl alcohol copolymer
US2669109A (en) * 1949-09-29 1954-02-16 Kuljian Corp Means for applying treating liquid to a filament as it moves over a thread storing and advancing reel
US2777751A (en) * 1951-03-08 1957-01-15 American Cyanamid Co Process for spinning aqueous-saline solutions of acrylonitrile polymers
US2731667A (en) * 1951-05-16 1956-01-24 Celanese Corp Wet spinning apparatus
GB750067A (en) * 1951-05-16 1956-06-06 Celanese Corp Production and treatment of filamentary materials
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US2684348A (en) * 1952-02-07 1954-07-20 Du Pont Compositions comprising an acrylonitrile polymer, an alkali metal or alkaline earth metal thiocyanate, and an aliphatic alcohol
US2714052A (en) * 1952-04-11 1955-07-26 American Cyanamid Co Method of washing a gelled thread of an acrylonitrile polymerization product
US2832993A (en) * 1952-05-13 1958-05-06 Western Electric Co Apparatus for extruding and cooling plastics
NL95553C (uk) * 1952-11-05
FR1082728A (fr) * 1953-06-01 1954-12-31 Dow Chemical Co Perfectionnements relatifs à un procédé de préparation de fibres
NL188905B (nl) * 1953-08-03 Stanford Res Inst Int Anthracyclineverbinding en farmaceutisch preparaat.
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US2810646A (en) * 1953-09-17 1957-10-22 American Cyanamid Co Water-laid webs comprising water-fibrillated, wet-spun filaments of an acrylonitrile polymer and method of producing them
BE531945A (uk) * 1953-09-21
US2876063A (en) * 1953-10-07 1959-03-03 Boyce C Bond Process and apparatus for treating fibrous materials
BE532996A (uk) * 1953-10-30 1900-01-01
DE1036463B (de) * 1953-11-04 1958-08-14 Basf Ag Verfahren zur Herstellung von kuenstlichen Gebilden, wie Faeden oder Fasern, aus Polyacrylnitril
US2974363A (en) * 1954-07-02 1961-03-14 Meyer Hans Method of and apparatus for the continuous production of synthetic fibers
DE1204775B (de) * 1954-08-04 1965-11-11 Kugelfischer G Schaefer & Co Vorrichtung zum Verstrecken vollsynthetischer Faeden
US3023134A (en) * 1955-07-15 1962-02-27 American Cyanamid Co Molded articles and method of making the same
US2798252A (en) * 1955-09-23 1957-07-09 American Cyanamid Co Spinnerette
US2881474A (en) * 1955-09-26 1959-04-14 American Cyanamid Co Spinning device
US2948581A (en) * 1955-12-20 1960-08-09 American Cyanamid Co Method of producing a synthetic fiber
US2918346A (en) * 1956-08-07 1959-12-22 Du Pont Process of orienting a dense tow of polymeric ester filaments by two step hot aqueous bath treatments
US2963457A (en) * 1956-08-22 1960-12-06 American Cyanamid Co Polymerization of acrylonitrile in aqueous solution containing a perchlorate salt
US3091507A (en) * 1956-08-27 1963-05-28 Dow Chemical Co Method of preventing ring dyeing in aquagel acrylonitrile polymer fibers by steamingthe fibers
US3097991A (en) * 1957-06-10 1963-07-16 Union Carbide Corp Synthetic fibrous products
US2949337A (en) * 1957-06-24 1960-08-16 Dow Chemical Co Washing tow bundles of synthetic fibers
US3000168A (en) * 1957-08-21 1961-09-19 American Enka Corp Method and apparatus for producing bulky yarn
US3086959A (en) * 1957-11-25 1963-04-23 Dow Chemical Co Graft copolymers of certain monomeric sulfonic acid compounds on certain nu-vinyl-2-oxazolidinone copolymer substrates and improved acrylonitrile polymer compositions obtainable therewith
US3029220A (en) * 1957-11-25 1962-04-10 Dow Chemical Co Graft copolymers of monomeric aminoethylacrylates and methacrylates on polyvinyllactams, acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3094504A (en) * 1957-11-25 1963-06-18 Dow Chemical Co Graft copolymers of certain monomeric sulfonic acid compounds on nu-vinyl-3-morpholinone polymer substrates and improved acrylonitrile polymer compositions obtainable therewith
NL233559A (uk) * 1957-11-25
US3029219A (en) * 1957-11-25 1962-04-10 Dow Chemical Co Graft copolymers comprised of monomeric vinyl benzyl polyglycol ethers on polyvinyllactams, acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3035009A (en) * 1957-11-25 1962-05-15 Dow Chemical Co Graft copolymers of monomeric acrylates and monomeric organic sulfonic acid compounds upon polyvinyllactams, acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3026291A (en) * 1957-11-25 1962-03-20 Dow Chemical Co Graft copolymers of certain monomeric sulfonic acids on polyvinyl lactams, improved acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3133039A (en) * 1957-11-25 1964-05-12 Dow Chemical Co Acrylonitrile polymer compositions
US3036033A (en) * 1957-11-25 1962-05-22 Dow Chemical Co Graft copolymers of mixtures of vinyl pyridine monomers and monomeric sulfonic acidsupon polyvinyllactams, acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3029218A (en) * 1957-11-25 1962-04-10 Dow Chemical Co Graft copolymers comprised of monomeric diacrylate esters of polyglycols on polyvinyllactams, acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3036032A (en) * 1957-11-25 1962-05-22 Dow Chemical Co Graft copolymers of mixtures of monomeric bisacrylamides and monomeric organic sulfonic acid compounds upon polyvinyllactams, improved acrylonitrile polymer compositions obtainable therewith, and method of preparation
BE589115A (uk) * 1958-04-16
US3275612A (en) * 1958-06-02 1966-09-27 Du Pont Biaxially oriented film of acrylonitrile polymers and process
US3047426A (en) * 1958-07-29 1962-07-31 Dow Chemical Co Process for treating a "nitrile alloy" article with a polyphenolic antistatic agent and product obtained thereby
US3067386A (en) * 1958-08-29 1962-12-04 Standard Oil Co Automatically temperature-compensated corrosion measurements
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BE588577A (uk) * 1959-03-13
DE1119458B (de) * 1959-09-23 1961-12-14 Wolfen Filmfab Veb Verfahren zum Faerben von Gebilden, besonders Faeden oder Fasern, aus Polymeren oder Copolymeren des Acrylnitrils
US3056169A (en) * 1959-09-28 1962-10-02 Du Pont Process of preparing shaped articles of acrylonitrile polymer containing silver insoluble particles
US3094505A (en) * 1959-09-28 1963-06-18 Dow Chemical Co Graft copolymers comprised of certain monomeric vinyl benzyl polyglycol ethers on nu-vinyl-3-morpholinone polymer substrates and improved acrylonitrile polymer compositions obtainable therewith
US3075947A (en) * 1959-09-28 1963-01-29 Dow Chemical Co Graft copolymers of vinyl benzyl polyglycol ethers and n-vinyl-2-oxazolidinone polymers, improved acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3015858A (en) * 1959-09-28 1962-01-09 Du Pont Process of preparing shaped articles of acrylonitrile polymer containing free metal particles
US3072599A (en) * 1959-10-05 1963-01-08 Dow Chemical Co Graft copolymers of mixtures of acrylates and sulfonic acids on n-vinyl-3-morpholinone polymers, improved acrylonitrile compositions, and method of preparation
US3072600A (en) * 1959-10-05 1963-01-08 Dow Chemical Co Graft copolymers of mixtures of acrylates and sulfonic acids on n-vinyl-2-oxazolidinone polymers, improved acrylonitrile polymer compositions, and method of preparation
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US3026295A (en) * 1959-12-03 1962-03-20 Dow Chemical Co Graft copolymers comprised of certain monomeric diacrylic esters of polyglycols on nu-vinyl-3-morpholinone polymer substrates, improved acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3026296A (en) * 1959-12-03 1962-03-20 Dow Chemical Co Graft copolymers comprised of certain monomeric diacrylic esters of polyglycols on certain nu-vinyl-2-oxazolidinone copolymer substrates, improved acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3026288A (en) * 1960-01-25 1962-03-20 Dow Chemical Co Graft copolymers comprised of mixtures of vinyl pyridine monomers and certain monomerc sulfonic acid compounds on certain nu-vinyl-2-oxazolidinone copolymer substrates, improved acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3026287A (en) * 1960-01-25 1962-03-20 Dow Chemical Co Graft copolymers comprised of mixtures of vinyl pyridine monomers and certain monomeric sulfonic acid compounds on nu-vinyl-3-morpholinone polymer substrates, improved acrylonitrile polymer compositions obtainable therewith, and method of preparation
US3057816A (en) * 1960-02-12 1962-10-09 Dow Chemical Co Graft copolymers comprised of acrylamide and methacrylamide monomers on preformed n-vinyl-2-oxazolidinone copolymers, acrylonitrile polymer compositions obtainable therewith, and method of preparing same
US3057817A (en) * 1960-02-12 1962-10-09 Dow Chemical Co Graft copolymers comprised of acrylamide and methacrylamide monomers on preformed n-vinyl-3-morpholinone polymers, acrylonitrile polymer compositions obtainable therewith, and method of preparing same
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US3080209A (en) * 1961-10-12 1963-03-05 Asahi Chemical Ind Method for producing acrylonitrile polymer fibers and filaments by wet spinning process
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US3389546A (en) * 1965-10-20 1968-06-25 Ethicon Inc Process and apparatus for making continuous strings from animal gut
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US4943618A (en) * 1987-12-18 1990-07-24 Kingston Technologies Limited Partnership Method for preparing polyacrylonitrile copolymers by heterogeneous reaction of polyacrylonitrile aquagel
WO2010106143A1 (en) 2009-03-20 2010-09-23 Dsm Ip Assets B.V. Net for aquaculture
EP3564416A1 (en) * 2013-10-29 2019-11-06 Braskem S.A. System and method of mechanical pre-recovery of at least one liquid in at least one polymeric yarn
CN104562253A (zh) * 2015-01-19 2015-04-29 中国计量学院 风液双冷型塑料拉丝机
CN106087087B (zh) * 2016-06-01 2018-02-23 恒天纤维集团有限公司 抗菌再生纤维素纤维及其制备方法
DE102019116512A1 (de) * 2018-06-26 2020-01-02 Oerlikon Textile Gmbh & Co. Kg Verfahren zur Konditionierung eines multifilen Fadens
CN109440203A (zh) * 2018-12-11 2019-03-08 江苏宝德新材料有限公司 一种聚芳噁二唑纺丝凝固浴槽及其使用方法

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BE412084A (uk) * 1934-12-08
DE651878C (de) * 1935-08-10 1937-10-21 I G Farbenindustrie Akt Ges Verfahren zur Gewinnung von reinem nachchloriertem Polyvinylchlorid
US2249797A (en) * 1937-09-04 1941-07-22 Ind Rayon Corp Apparatus for the manufacture of thread or the like
US2161766A (en) * 1937-09-15 1939-06-06 Carbide & Carbon Chem Corp Synthetic fiber
US2354744A (en) * 1940-09-28 1944-08-01 Dreyfus Camille Method of producing shaped resinous artificial materials
BE465697A (uk) * 1942-06-17
BE465461A (uk) * 1943-10-02 1900-01-01
US2538283A (en) * 1946-08-14 1951-01-16 American Viscose Corp Apparatus for spinning artificial filaments

Also Published As

Publication number Publication date
FR65364E (fr) 1956-02-09
GB689742A (en) 1953-04-01
GB673738A (en) 1952-06-11
GB695448A (en) 1953-08-12
FR61908E (fr) 1955-05-31
BE487570A (uk)
US2614289A (en) 1952-10-21
CH319132A (fr) 1957-01-31
BE492596A (uk)
GB695536A (en) 1953-08-12
GB689743A (en) 1953-04-01
US2558734A (en) 1951-07-03
DE940670C (de) 1956-03-22
FR65206E (fr) 1956-02-07
GB689744A (en) 1953-04-01
GB715915A (en) 1954-09-22
FR61907E (fr) 1955-05-31
BE493893A (uk)
FR980700A (fr) 1951-05-16
FR61906E (fr) 1955-05-31
BE492595A (uk)
US2558730A (en) 1951-07-03
CH318119A (fr) 1956-12-15
CH292747A (fr) 1953-08-31
GB689770A (en) 1953-04-01
GB672775A (en) 1952-05-28

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