DE1517297B - Smoke filters for tobacco products - Google Patents

Smoke filters for tobacco products

Info

Publication number
DE1517297B
DE1517297B DE19631517297D DE1517297DA DE1517297B DE 1517297 B DE1517297 B DE 1517297B DE 19631517297 D DE19631517297 D DE 19631517297D DE 1517297D A DE1517297D A DE 1517297DA DE 1517297 B DE1517297 B DE 1517297B
Authority
DE
Germany
Prior art keywords
tobacco products
smoke filters
smoke
filters
tobacco
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
DE19631517297D
Other languages
German (de)
Inventor
Keith Charles Herbert
Bates Jun William Wannamaker
Vello Norman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liggett Group Inc
Original Assignee
Liggett Group Inc
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.)
Filing date
Publication date
Priority to US262653A priority Critical patent/US3251365A/en
Application filed by Liggett Group Inc filed Critical Liggett Group Inc
Publication of DE1517297B publication Critical patent/DE1517297B/en
Application status is Pending legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2803Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/14Use of materials for tobacco smoke filters of organic materials as additive
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/16Use of materials for tobacco smoke filters of inorganic materials
    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SMOKERS' REQUISITES
    • A24DCIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00Tobacco smoke filters, e.g. filter-tips, filtering inserts; Mouthpieces for cigars or cigarettes
    • A24D3/06Use of materials for tobacco smoke filters
    • A24D3/16Use of materials for tobacco smoke filters of inorganic materials
    • A24D3/163Carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004Sorbent size or size distribution, e.g. particle size
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28057Surface area, e.g. B.E.T specific surface area
    • B01J20/28066Surface area, e.g. B.E.T specific surface area being more than 1000 m2/g
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/30Active carbon
    • C01B32/312Preparation
    • C01B32/342Preparation characterised by non-gaseous activating agents
    • C01B32/348Metallic compounds
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/30Active carbon
    • C01B32/354After-treatment
    • C01B32/384Granulation
DE19631517297D 1963-03-04 1963-12-20 Smoke filters for tobacco products Pending DE1517297B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US262653A US3251365A (en) 1963-03-04 1963-03-04 Tobacco smoke filter

Publications (1)

Publication Number Publication Date
DE1517297B true DE1517297B (en) 1970-08-06

Family

ID=22998436

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19631517297D Pending DE1517297B (en) 1963-03-04 1963-12-20 Smoke filters for tobacco products

Country Status (14)

Country Link
US (1) US3251365A (en)
AT (1) AT251464B (en)
BE (1) BE640746A (en)
CH (1) CH440083A (en)
CY (1) CY323A (en)
DE (1) DE1517297B (en)
DK (1) DK111197B (en)
FI (1) FI40148C (en)
FR (1) FR1356061A (en)
GB (1) GB973854A (en)
LU (1) LU45118A1 (en)
NL (2) NL123406C (en)
OA (1) OA272A (en)
SE (1) SE302737B (en)

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* Cited by examiner, † Cited by third party
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GB1009535A (en) * 1963-10-15 1965-11-10 British American Tobacco Co Improvements in tobacco-smoke filters
US3338246A (en) * 1964-05-04 1967-08-29 Union Carbide Corp Smoking tobacco preparation
US3330285A (en) * 1964-07-14 1967-07-11 Arthur E Bergquist Filtering material and process
CH468797A (en) * 1965-01-11 1969-02-28 De Rech S Tech Ets Filter plugs for tobacco products, particularly for cigarettes
US3420245A (en) * 1965-02-05 1969-01-07 Eastman Kodak Co Particulate cellulose acetate tobacco smoke filter
US3357320A (en) * 1965-02-05 1967-12-12 Brown & Williamson Tobacco Multiple filter assembly apparatus
US3428056A (en) * 1965-07-21 1969-02-18 Eastman Kodak Co Tobacco smoke filter incorporating coated polyolefin additive
US3426763A (en) * 1965-07-21 1969-02-11 Eastman Kodak Co Tobacco smoke filter having a coated carbon additive
US3428054A (en) * 1965-10-18 1969-02-18 Chemway Filters Inc Filter
US3416541A (en) * 1965-10-24 1968-12-17 Andrew C. Hoover Jr. Cigarette filter
US3351072A (en) * 1965-11-16 1967-11-07 Esco Corp Tobacco smoke filter
US3460543A (en) * 1966-03-21 1969-08-12 Liggett & Myers Inc Cigarette filter
US3410277A (en) * 1966-08-10 1968-11-12 Lorillard Co P Tobacco having an oxadiazole additive
US3434479A (en) * 1966-09-15 1969-03-25 Liggett & Myers Tobacco Co Permanganate tobacco smoke filter
US3424168A (en) * 1966-11-21 1969-01-28 Pittsburgh Activated Carbon Co Removing contaminants from cigarette smoke
US3390687A (en) * 1967-01-23 1968-07-02 Riviana Foods Inc Tobacco smoke filter for cigarettes, cigars, pipes and the like
US3403690A (en) * 1967-03-07 1968-10-01 Brown & Williamson Tobacco Filters for tobacco smoke
US3390688A (en) * 1967-03-13 1968-07-02 Eastman Kodak Co Filter for removing oxides of nitrogen from tobacco smoke
US3459194A (en) * 1967-05-22 1969-08-05 Bertram Eichel Tobacco product incorporating a filter designed to inhibit the adverse effect of tobacco smoke on oral ubiquitous leucocytes
US3527235A (en) * 1968-05-24 1970-09-08 Matra Corp Tobacco smoke filter device
US3502087A (en) * 1968-07-05 1970-03-24 Ernest J Romano Cigarette filter
US3602233A (en) * 1969-05-06 1971-08-31 Ppg Industries Inc Smoking device incorporating microporous glass particle filter
US3635226A (en) * 1969-06-16 1972-01-18 British American Tobacco Co Tobacco-smoke filters
US3664350A (en) * 1969-12-12 1972-05-23 Byron T Wall Cigarette
US3658069A (en) * 1970-02-17 1972-04-25 Stanford Research Inst Filter for reducing the level of carbon monoxide in tobacco smoke
US3596665A (en) * 1970-03-04 1971-08-03 Knud Lindgard Tobacco smoke filter
GB1284673A (en) * 1970-04-20 1972-08-09 British American Tobacco Co Improvements relating to tobacco-smoke filters
USRE28858E (en) * 1970-09-25 1976-06-15 Brown & Williamson Tobacco Corporation Selective gas phase filter material
US3636957A (en) * 1971-03-05 1972-01-25 Charles M Saffer Jr Cigar smoke filter and method for improving the quality of cigar smoke
US3703901A (en) * 1971-03-11 1972-11-28 Liggett & Myers Inc Tobacco composition
US3809097A (en) * 1971-07-27 1974-05-07 B Clayton Tobacco smoke filter
US3802441A (en) * 1972-01-26 1974-04-09 Brown & Williamson Tobacco Tobacco smoke filter additive
GB1381800A (en) * 1972-04-26 1975-01-29 Rothmans Of Pall Mall Filter for tobacco smoke
US3858587A (en) * 1974-02-05 1975-01-07 Anthony R Cavelli Magna-tip
US3998232A (en) * 1974-10-31 1976-12-21 Smith Avery B Filtering tobacco smoke
JPS5198399A (en) * 1975-02-26 1976-08-30 Katsuseitankinokyokahoto kitsuenguno kairyo
FR2306645B1 (en) * 1975-04-11 1977-11-25 Bour Andre
US4038992A (en) * 1975-09-29 1977-08-02 The Japan Tobacco & Salt Public Corporation Granular composition for tobacco filter
US4149549A (en) * 1976-05-17 1979-04-17 Montclair Research Corporation Cigarette and filter
CH608177A5 (en) * 1977-02-21 1978-12-29 Neukomm Serge
US4266561A (en) * 1978-04-10 1981-05-12 Brown & Williamson Tobacco Corporation Tobacco smoke filtering compositions
US4226250A (en) * 1978-07-12 1980-10-07 Peterson Labs., Inc. Smoking system to filter tobacco smoke
FI67478C (en) * 1979-11-13 1985-04-10 British American Tobacco Co Filter Foer tobaksroek
DE3013256C2 (en) * 1980-04-03 1988-06-16 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen, De
JPS58141775A (en) * 1982-02-16 1983-08-23 Suntory Ltd Filter for tobacco
US4889143A (en) * 1986-05-14 1989-12-26 R. J. Reynolds Tobacco Company Cigarette rods and filters containing strands provided from sheet-like materials
US5360023A (en) * 1988-05-16 1994-11-01 R. J. Reynolds Tobacco Company Cigarette filter
US5150723A (en) * 1988-09-28 1992-09-29 Eastman Kodak Company Process for the production of tobacco smoke filters
US4964426A (en) * 1988-09-28 1990-10-23 Eastman Kodak Company Tobacco smoke filters and process for production thereof
US5063196A (en) * 1989-06-23 1991-11-05 Calgon Carbon Corporation Chromium-free impregnated activated carbon for adsorption of toxic gases and/or vapors
US5404890A (en) * 1993-06-11 1995-04-11 R. J. Reynolds Tobacco Company Cigarette filter
EP0693258B1 (en) * 1994-07-19 1999-06-02 British-American Tobacco (Germany) GmbH Tobacco cartridge
US5678576A (en) * 1995-01-06 1997-10-21 Nazaroff; William W. Apparatus for treating environmental tobacco smoke (ETS) particle and gas-phase contaminants
US6209547B1 (en) 1998-10-29 2001-04-03 Philip Morris Incorporated Cigarette filter
US6911189B1 (en) 1999-10-29 2005-06-28 Philip Morris Usa Inc. Filter for selective removal of a gaseous component
US6591839B2 (en) 1999-02-17 2003-07-15 Dieter Meyer Filter material for reducing harmful substances in tobacco smoke
MY128157A (en) * 2000-04-20 2007-01-31 Philip Morris Prod High efficiency cigarette filters having shaped micro cavity fibers impregnated with adsorbent or absorbent materials
US6344071B1 (en) 2000-05-22 2002-02-05 3M Innovative Properties Company Broad spectrum filter system for filtering contaminants from air or other gases
US6799578B2 (en) * 2000-09-18 2004-10-05 Rothmans, Benson & Hedges Inc. Low sidestream smoke cigarette with combustible paper
WO2002037990A2 (en) * 2000-11-10 2002-05-16 Vector Tobacco Ltd. Method and product for removing carcinogens from tobacco smoke
US6481442B1 (en) * 2000-11-28 2002-11-19 Lorillard Licensing Company, Llc Smoking article including a filter for selectively removing carbonyls
ITPI20010014A1 (en) * 2001-03-05 2002-09-05 Ivo Pera Composed for cigarette filters, or other smoking articles, based antioxidants and cosi'ottenuto filter
US6767860B2 (en) 2001-05-10 2004-07-27 3M Innovative Properties Company Sublimation of solid organic compounds onto substrate surfaces in the presence of a fluid impregnant
US7011096B2 (en) 2001-08-31 2006-03-14 Philip Morris Usa Inc. Oxidant/catalyst nanoparticles to reduce carbon monoxide in the mainstream smoke of a cigarette
DE60213103T2 (en) * 2001-09-14 2007-02-15 Amr International Corp., Bridgetown A process for the preparation of microporous materials which are coated with oxides of rare earth metals
WO2003041521A2 (en) * 2001-11-09 2003-05-22 Vector Tobacco Inc. Method and composition for mentholation of charcoal filtered cigarettes
EP1455609A2 (en) * 2001-12-19 2004-09-15 Vector Tobacco Inc. Method and compositions for imparting cooling effect to tobacco products
AT341952T (en) * 2001-12-19 2006-11-15 Vector Tobacco Ltd A method and composition for menthol cigarettes fortification of
NZ535029A (en) * 2002-03-15 2007-04-27 Rothmans Bensons & Hedges Inc Low sidestream smoke cigarette with combustible paper having modified ash characteristics
US6769437B2 (en) 2002-04-08 2004-08-03 Philip Morris Incorporated Use of oxyhydroxide compounds for reducing carbon monoxide in the mainstream smoke of a cigarette
JP4388379B2 (en) * 2002-04-12 2009-12-24 フィリップ・モーリス・プロダクツ・ソシエテ・アノニム Partially reduced nanoparticle additive for reducing the amount of carbon monoxide and / or nitric oxide in mainstream smoke of a cigarette
US6782892B2 (en) 2002-08-30 2004-08-31 Philip Morris Usa Inc. Manganese oxide mixtures in nanoparticle form to lower the amount of carbon monoxide and/or nitric oxide in the mainstream smoke of a cigarette
US20040231684A1 (en) * 2003-05-20 2004-11-25 Zawadzki Michael A. Smoking article and smoking article filter
US7669604B2 (en) * 2003-09-30 2010-03-02 R.J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7240678B2 (en) 2003-09-30 2007-07-10 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7856990B2 (en) * 2003-09-30 2010-12-28 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US7237558B2 (en) * 2003-09-30 2007-07-03 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US8066011B2 (en) * 2003-09-30 2011-11-29 R. J. Reynolds Tobacco Company Filtered cigarette incorporating an adsorbent material
US8701681B2 (en) 2003-10-27 2014-04-22 Philip Morris Usa Inc. Use of oxyhydroxide compounds in cigarette paper for reducing carbon monoxide in the mainstream smoke of a cigarette
US7640936B2 (en) * 2003-10-27 2010-01-05 Philip Morris Usa Inc. Preparation of mixed metal oxide catalysts from nanoscale particles
US7509961B2 (en) 2003-10-27 2009-03-31 Philip Morris Usa Inc. Cigarettes and cigarette components containing nanostructured fibril materials
US8051859B2 (en) 2003-10-27 2011-11-08 Philip Morris Usa Inc. Formation and deposition of sputtered nanoscale particles in cigarette manufacture
RS51472B (en) * 2004-11-10 2011-04-30 Philip Morris Products S.A. Capsuled adsorbent flavored filter
GB0506278D0 (en) * 2005-03-29 2005-05-04 British American Tobacco Co Porous carbon materials and smoking articles and smoke filters therefor incorporating such materials
US20070056600A1 (en) * 2005-09-14 2007-03-15 R. J. Reynolds Tobacco Company Filtered smoking article
US8042552B2 (en) * 2005-12-13 2011-10-25 Philip Morris Usa Inc. Incorporation of ammonia-release compounds in smoking articles
US20070235049A1 (en) * 2006-03-31 2007-10-11 Philip Morris Usa Inc. Magnetic filter elements and cigarettes having magnetic filter elements
US20070235046A1 (en) * 2006-03-31 2007-10-11 Philip Morris Usa Inc. Smoking articles comprising magnetic filter elements
US8739802B2 (en) 2006-10-02 2014-06-03 R.J. Reynolds Tobacco Company Filtered cigarette
US20080134893A1 (en) * 2006-12-08 2008-06-12 Thauming Kuo Particulate filter media
US7855261B2 (en) * 2006-12-08 2010-12-21 Eastman Chemical Company Aldehyde removal
US20080135058A1 (en) * 2006-12-08 2008-06-12 Ted Calvin Germroth Tobacco smoke filter and method for removal of aldehydes from tobacco smoke
EP2130444A1 (en) 2008-06-06 2009-12-09 Xavier Wertz Smokable material and smokable articles
GB201112539D0 (en) * 2011-07-21 2011-08-31 British American Tobacco Co Porous carbon and methods of production thereof

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR711397A (en) * 1931-02-17 1931-09-08 Nikostop Ipari Es Kereskedelmi A process for preparing a substance or filter for purifying tobacco smoke
FR766247A (en) * 1933-12-29 1934-06-25 Method and apparatus for the absorption of nicotine and other harmful substances in tobacco pipes, cigar and cigarette holders
DE608484C (en) * 1931-03-06 1935-01-26 Willy Stelkens A method for reducing the toxic effect of tobacco smoke
DE612737C (en) * 1933-09-23 1935-05-03 Carbo Norit Union Verwaltungs Filter insert for cigar, cigarette, smoke peaks o. The like.
DE666035C (en) * 1936-10-04 1938-10-08 Emma Elisabeth Lutter A method of manufacturing a filter material for the smoke filters of cigarettes
DE669172C (en) * 1935-06-28 1938-12-19 Helios Societa Cartaria A G L Filters for cigarette, cigar holders or Zigarettenmundstuecke
GB685822A (en) * 1951-05-22 1953-01-14 Mario Francone An improved filtering agent for tobacco smoke
GB863287A (en) * 1957-12-13 1961-03-22 Lorillard Co P Smoking tobacco product

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GB190228470A (en) * 1902-12-24 1903-02-12 Pierre Mercier New or Improved Means for Preventing or Minimizing the Deleterious Effects of Tobacco Smoke
GB190507808A (en) * 1905-04-12 1906-03-15 James Dewar Improved Absorbents for Gases or Vapours and the Application thereof for Purifying or Recovering Gases or Vapours or like purposes.
US1519470A (en) * 1921-01-22 1924-12-16 Robert E Wilson Impregnated carbon and process of making same
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US2511290A (en) * 1942-05-01 1950-06-13 Us Sec War Method of impregnating activated carbon
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Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR711397A (en) * 1931-02-17 1931-09-08 Nikostop Ipari Es Kereskedelmi A process for preparing a substance or filter for purifying tobacco smoke
DE608484C (en) * 1931-03-06 1935-01-26 Willy Stelkens A method for reducing the toxic effect of tobacco smoke
DE612737C (en) * 1933-09-23 1935-05-03 Carbo Norit Union Verwaltungs Filter insert for cigar, cigarette, smoke peaks o. The like.
FR766247A (en) * 1933-12-29 1934-06-25 Method and apparatus for the absorption of nicotine and other harmful substances in tobacco pipes, cigar and cigarette holders
DE669172C (en) * 1935-06-28 1938-12-19 Helios Societa Cartaria A G L Filters for cigarette, cigar holders or Zigarettenmundstuecke
DE666035C (en) * 1936-10-04 1938-10-08 Emma Elisabeth Lutter A method of manufacturing a filter material for the smoke filters of cigarettes
GB685822A (en) * 1951-05-22 1953-01-14 Mario Francone An improved filtering agent for tobacco smoke
GB863287A (en) * 1957-12-13 1961-03-22 Lorillard Co P Smoking tobacco product

Also Published As

Publication number Publication date
CH440083A (en) 1967-07-15
LU45118A1 (en) 1964-02-27
US3251365A (en) 1966-05-17
AT251464B (en) 1967-01-10
NL293155A (en)
GB973854A (en) 1964-10-28
OA272A (en) 1966-05-15
FI40148C (en) 1968-10-10
FR1356061A (en) 1964-03-20
NL123406C (en) 1967-07-17
FI40148B (en) 1968-06-28
SE302737B (en) 1968-07-29
BE640746A (en) 1964-06-03
DK111197B (en) 1968-06-24
CY323A (en) 1965-10-30

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