GB1396724A - Insulation of high temperature furnaces - Google Patents

Insulation of high temperature furnaces

Info

Publication number
GB1396724A
GB1396724A GB2733472A GB2733472A GB1396724A GB 1396724 A GB1396724 A GB 1396724A GB 2733472 A GB2733472 A GB 2733472A GB 2733472 A GB2733472 A GB 2733472A GB 1396724 A GB1396724 A GB 1396724A
Authority
GB
United Kingdom
Prior art keywords
stud
nut
ring
june
engage
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.)
Expired
Application number
GB2733472A
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.)
Sauder Industries Inc
Original Assignee
Sauder Industries 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
Application filed by Sauder Industries Inc filed Critical Sauder Industries Inc
Publication of GB1396724A publication Critical patent/GB1396724A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F27D1/0009—Comprising ceramic fibre elements
    • F27D1/002—Comprising ceramic fibre elements the fibre elements being composed of adjacent separate strips
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/902—High modulus filament or fiber
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24008—Structurally defined web or sheet [e.g., overall dimension, etc.] including fastener for attaching to external surface
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24132—Structurally defined web or sheet [e.g., overall dimension, etc.] including grain, strips, or filamentary elements in different layers or components parallel
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24174—Structurally defined web or sheet [e.g., overall dimension, etc.] including sheet or component perpendicular to plane of web or sheet
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/2419—Fold at edge
    • Y10T428/24215—Acute or reverse fold of exterior component
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249923—Including interlaminar mechanical fastener

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Thermal Insulation (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

1396724 Welding by pressure SAUDER INDUSTRIES Inc 12 June 1972 [28 June 1971] 27334/72 Heading B3R [Also in Divisions F4 and F2] An insulating lining member for the inside of a furnace comprises a refractory fibre mat formed of strips 22<SP>1</SP>, 34 held together by wires and a refractory block 28, and is secured to the furnace wall 32 by a stud passing through a hole 36 in the block 28. The stud 38 carries a washer and nut 42, 40, which are concealed within the fibre mat. The stud 48 has a reduced section tip 44, Fig. 8, and a retaining ring 46 having radial fingers engaging a groove 48. An arc shield 50 is secured to the ring 46. A welding gun 52, Fig. 7, is inserted between two fibre strips 22<SP>1</SP> to engage the top of the stud 38, and the tip 44 burns away to start an arc which burns away the fingers of the ring 46 to allow the stud spark to plunge into the metal of the wall, Fig. 9. The welding gun may be provided with an opening to engage the nut 40 so that it can be used to tighten the nut on the stud.
GB2733472A 1971-06-28 1972-06-12 Insulation of high temperature furnaces Expired GB1396724A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00157433A US3819468A (en) 1971-06-28 1971-06-28 High temperature insulation module

Publications (1)

Publication Number Publication Date
GB1396724A true GB1396724A (en) 1975-06-04

Family

ID=22563696

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2733472A Expired GB1396724A (en) 1971-06-28 1972-06-12 Insulation of high temperature furnaces

Country Status (14)

Country Link
US (1) US3819468A (en)
JP (3) JPS5532996B1 (en)
AR (1) AR200844A1 (en)
BE (1) BE785513A (en)
BR (1) BR7204236D0 (en)
CA (2) CA964058A (en)
DE (1) DE7224179U (en)
FR (1) FR2199858A5 (en)
GB (1) GB1396724A (en)
HK (1) HK52479A (en)
IT (1) IT958523B (en)
NL (1) NL158610B (en)
NO (1) NO130704C (en)
SE (1) SE380615B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406779A1 (en) * 1977-10-22 1979-05-18 Mckechnie Refractory Fibres Thermally insulating block for oven - is formed by concertina folds of fibre material and is secured by stud and barbed plate against oven wall
GB2117877A (en) * 1982-03-27 1983-10-19 Fuel Conservation Services Thermally insulating blocks
GB2123937A (en) * 1982-06-10 1984-02-08 Denki Kagaku Kogyo Kk Furnace wall
AU606870B2 (en) * 1981-12-17 1991-02-21 Thermal Ceramics Inc. Insulation and the provision thereof

Families Citing this family (85)

* Cited by examiner, † Cited by third party
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JPS5314085B2 (en) * 1973-02-12 1978-05-15
GB1466241A (en) * 1973-06-28 1977-03-02 Zirconal Processes Ltd Linings for furnaces or the like
US3928097A (en) * 1974-03-01 1975-12-23 Sauder Industries Process and machine for manufacturing insulation modules
US4001996A (en) * 1974-06-03 1977-01-11 J. T. Thorpe Company Prefabricated insulating blocks for furnace lining
US4012877A (en) * 1974-06-03 1977-03-22 J. T. Thorpe Company Prefabricated insulating structure for insulating a corner in a furnace
US3968281A (en) * 1974-07-15 1976-07-06 Sybron Corporation Filter molded heating and/or insulating member
US4194036A (en) * 1975-07-29 1980-03-18 Zirconal Processes Limited Module for furnace walls totally wrapped with thermally combustible material
AU502325B2 (en) * 1975-07-29 1979-07-19 Zirconal Processes Ltd. The modular construction of furnaces
GB1562203A (en) * 1975-08-11 1980-03-05 Johns Manville Prefabricated insulating blocks for lining walls and roofs
US3990203A (en) * 1976-03-29 1976-11-09 Greaves James R Insulated ceramic fiber panels for portable high temperature chambers
US4177036A (en) * 1976-06-10 1979-12-04 Sauder Industries, Inc. High temperature industrial furnace
DE2636688C2 (en) * 1976-07-05 1982-08-19 Schweitzer U. Co Gmbh, 5900 Siegen Thermally insulating wall structure for industrial furnaces
JPS5318609A (en) * 1976-08-05 1978-02-21 Isolite Babcock Refractories Refractory and heat insulating wall
US4166878A (en) * 1976-10-01 1979-09-04 Caterpillar Tractor Co. Gas turbine engine internal insulation comprising metallic mesh--restrained ceramic fiber layer
HU174600B (en) * 1976-11-05 1980-02-28 Kohaszati Gyarepitoe Vallalat Electric resistance heated furnace, preferably for heat treatment
US4086737A (en) * 1977-01-07 1978-05-02 Johns-Manville Corporation Refractory fiber blanket module with heat shrinkage compensation
US4120641A (en) * 1977-03-02 1978-10-17 The Carborundum Company Ceramic fiber module attachment system
CA1085282A (en) * 1977-04-12 1980-09-09 Paul E. Metcalfe Heat insulating material and method of and apparatus for the manufacture thereof
US4336086A (en) * 1977-08-24 1982-06-22 Rast James P Method of lining a furnace with roll-type insulation
FR2403317A1 (en) * 1977-09-19 1979-04-13 Produits Refractaires REFRACTORY FIBER INSULATION SLAB
US4194282A (en) * 1978-04-28 1980-03-25 Johns-Manville Corporation Method and apparatus for filling seams between adjacent fiber blanket insulation modules
US4202148A (en) * 1978-06-26 1980-05-13 Industrial Insulations, Inc. Method of making thick-walled refractory fiber modules and the product formed thereby
US4348441A (en) * 1979-01-05 1982-09-07 Isolite Babcock Refractories Co., Ltd. Fibrous insulating material and insulating wall
US4272638A (en) * 1979-03-16 1981-06-09 Johns-Manville Corporation Heater element supports for use with fibrous block insulations
NL185584C (en) * 1979-04-13 1990-05-16 Heattreatment Advising Co OVEN WITH A WALL OF HEAT-INSULATING MATERIAL.
US4223064A (en) * 1979-05-10 1980-09-16 The United States Of America As Represented By The United States Department Of Energy Alkali metal protective garment and composite material
US4248023A (en) * 1979-07-26 1981-02-03 A. P. Green Refractories Co. Insulated ceramic fiber refractory module
US4414786A (en) * 1980-03-28 1983-11-15 Frahme Carl E Heat insulating module for high temperature chambers
US4363199A (en) * 1980-05-05 1982-12-14 Kennecott Corporation Fire resistant sealing system for holes in fire resistant building partitions
US4379382A (en) * 1980-06-02 1983-04-12 Sauder Industries, Inc. Method and apparatus for insulating a furnace having a corrosive atmosphere
US4339902A (en) * 1980-06-30 1982-07-20 Manville Service Corporation Multiple layer thermal insulation device
ES8302287A1 (en) * 1981-02-09 1982-12-16 Detrick M H Co Method of veneering brick linings of furnaces and other high temperature enclosures.
US4429504A (en) * 1981-03-20 1984-02-07 Manville Service Corporation Fiber blanket insulation module
US4381634A (en) * 1981-03-20 1983-05-03 Manville Service Corporation Fiber blanket insulation module
FR2507594B1 (en) * 1981-06-12 1985-06-28 Lafarge Refractaires MODULAR ASSEMBLY OF CERAMIC FIBERS FOR THE FURNISHING OF OVENS AND METHOD OF IMPLEMENTING SAME
US4401613A (en) * 1981-08-03 1983-08-30 Refractory Products Co. Method of making thermal-insulating module
AU557614B2 (en) * 1981-10-16 1986-12-24 Thermal Ceramics Inc. Rod-anchored, accordian-fold, full-lining module
US4435468A (en) * 1982-02-12 1984-03-06 Kennecott Corp. Seamless ceramic fiber composite articles and method and apparatus for their production
US4763458A (en) * 1982-05-18 1988-08-16 Ksm Fastening Systems, Inc. Insulation system and method and apparatus for retaining same
US4478022A (en) * 1982-05-18 1984-10-23 Ksm Fastening Systems Inc. Insulation system and method and apparatus for retaining same
US4504957A (en) * 1982-10-20 1985-03-12 Armco Inc. High temperature box annealing furnace
US4802425A (en) * 1982-12-16 1989-02-07 The Babcock & Wilcox Company High temperature fiber system with controlled shrinkage and stress resistance
US4647022A (en) * 1983-01-10 1987-03-03 Coble Gary L Refractory insulation mounting system and insulated structures
US5308046A (en) * 1983-01-10 1994-05-03 Coble Gary L Insulated furnace door system
US5483548A (en) * 1983-01-10 1996-01-09 Coble; Gary L. Insulated furnace door and wall panel system
US4653171A (en) * 1983-01-10 1987-03-31 Coble Gary L Refractory insulation mounting system and insulated structures
GB2140833B (en) 1983-05-20 1987-07-29 Toshiba Monofrax Laminar block and method of and apparatus for producing same
JPS59213692A (en) * 1983-05-20 1984-12-03 東芝モノフラツクス株式会社 Inorganic fiber heat insulating block
FR2555300B1 (en) * 1983-11-23 1986-09-05 Lafarge Refractaires DEVICE FOR FIXING A MODULAR ASSEMBLY FOR THE TRIM OF OVEN OR THERMAL ENCLOSURE WALLS
JPH07103954B2 (en) * 1984-04-02 1995-11-08 株式会社日立製作所 Vacuum insulation
JPH07103955B2 (en) * 1984-04-02 1995-11-08 株式会社日立製作所 Vacuum insulation
US5398840A (en) * 1984-11-02 1995-03-21 The Boeing Company Microparticle enhanced fibrous ceramic baffle for cryogenic liquid containers
US6333000B1 (en) 1984-11-02 2001-12-25 The Boeing Company Process for making LaMnO3-coated ceramics
US5549850A (en) * 1984-11-02 1996-08-27 The Boeing Company LaMnO3 -coated ceramics
US5569343A (en) * 1984-11-02 1996-10-29 The Boeing Company Ceramic fabric reinforced fiber/microparticle ceramic composite
US5010706A (en) * 1986-10-17 1991-04-30 Thermal Ceramics, Inc. Insulation and the provision thereof
US4829734A (en) * 1986-10-31 1989-05-16 Eltech Systems Corporation Ceramic fiber insulation module and method of assembly
JPS63140253A (en) * 1986-12-03 1988-06-11 株式会社日立製作所 Air conditioner
US4803822A (en) * 1987-01-30 1989-02-14 Stemcor Corporation Modular furnace lining and hardware system therefor
US4850171A (en) * 1987-01-30 1989-07-25 Stemcor Corporation Modular furnace lining and hardware system therefor
US4885890A (en) * 1987-01-30 1989-12-12 Stemcor Corporation Modular furnace lining and hardware system therefor
DE68929046T2 (en) * 1988-04-28 1999-12-23 Mitsubishi Jukogyo K.K., Tokio/Tokyo Carbon fiber reinforced carbon composites, processes for their manufacture and their use as inner walls of nuclear fusion reactors
JP2531772B2 (en) * 1989-01-09 1996-09-04 株式会社東芝 Ozone generator
US5753570A (en) * 1989-07-18 1998-05-19 The Boeing Company Reinforced ceramic microform composite
US5277955A (en) * 1989-12-08 1994-01-11 Owens-Corning Fiberglas Technology Inc. Insulation assembly
CA2040581A1 (en) * 1990-04-18 1991-10-19 Robert W. Caffey Insulation module assembly and method and apparatus for installation
US5115114A (en) * 1990-04-25 1992-05-19 Eltech Systems Corporation Ceramic fiber attaching system for a backing plate
US5176876A (en) * 1990-10-10 1993-01-05 Simko & Sons Industrial Refractories Inc. Insulating ceramic fiber batting module, anchoring system, ladle cover assembly and method of assembly
US5234660A (en) * 1990-10-10 1993-08-10 Simko & Sons Industrial Refractories, Inc. Insulating ceramic fiber batting module, anchoring system, ladle cover assembly and method of assembly
EP0561000A1 (en) * 1991-10-09 1993-09-22 Seiko Epson Corporation Data recording medium, its production, and data recording/reproduction apparatus
JP2664573B2 (en) * 1991-10-15 1997-10-15 株式会社クボタ Vacuum insulation wall filler
US5402615A (en) * 1992-11-13 1995-04-04 International Copper Association, Ltd. Fire retardant barrier system and method
US5624613A (en) * 1993-04-01 1997-04-29 The Boeing Company Rigidized refractory fibrous ceramic insulation
US5318644A (en) * 1993-06-02 1994-06-07 Owens-Corning Fiberglas Technology Inc. Method and apparatus for making an insulation assembly
US5759663A (en) * 1996-10-31 1998-06-02 Thorpe Products Company Hard-faced insulating refractory fiber linings
EP1114291B1 (en) * 1998-07-24 2004-02-18 TFW Dixon &amp; Son Limited Furnace lining
US6969250B1 (en) 1998-12-01 2005-11-29 Ebara Corporation Exhaust gas treating device
US7377084B2 (en) * 2000-04-24 2008-05-27 Hunter Douglas Inc. Compressible structural panel
US20090165942A1 (en) * 2007-12-26 2009-07-02 National Starch And Chemical Investment Holding Corporation Insulation and Method of Installing
US8307717B2 (en) * 2008-08-22 2012-11-13 Refractory Anchors, Inc. Method and apparatus for installing an insulation material to a surface and testing thereof
US8763473B2 (en) 2008-08-22 2014-07-01 Refractory Anchors, Inc. Method and apparatus for installing a refractory material to a surface
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US9310132B1 (en) * 2012-02-08 2016-04-12 Carbonyx, Inc. Replaceable insulation roof for industrial oven
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FR935903A (en) * 1945-11-21 1948-07-05 Fibrous products and method and apparatus for making them
FR1152102A (en) * 1956-01-05 1958-02-12 Leuna Werke Veb Lightweight plate linings for ovens, fireplaces and boilers
US3012923A (en) * 1957-09-30 1961-12-12 Owens Corning Fiberglass Corp Fibrous products and method and apparatus for producing same
US3118807A (en) * 1960-02-25 1964-01-21 Johns Manville Bonded fibrous insulation
GB1233537A (en) * 1967-05-25 1971-05-26
FR1603973A (en) * 1968-09-30 1971-06-21

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406779A1 (en) * 1977-10-22 1979-05-18 Mckechnie Refractory Fibres Thermally insulating block for oven - is formed by concertina folds of fibre material and is secured by stud and barbed plate against oven wall
AU606870B2 (en) * 1981-12-17 1991-02-21 Thermal Ceramics Inc. Insulation and the provision thereof
GB2117877A (en) * 1982-03-27 1983-10-19 Fuel Conservation Services Thermally insulating blocks
GB2123937A (en) * 1982-06-10 1984-02-08 Denki Kagaku Kogyo Kk Furnace wall

Also Published As

Publication number Publication date
AR200844A1 (en) 1974-12-27
NO130704C (en) 1975-01-22
JPS6220444B2 (en) 1987-05-07
NL7208434A (en) 1973-01-02
CA1039947B (en) 1978-10-10
NL158610B (en) 1978-11-15
DE2231658B2 (en) 1975-07-03
NO130704B (en) 1974-10-14
JPS6334391B2 (en) 1988-07-11
SE380615B (en) 1975-11-10
US3819468A (en) 1974-06-25
JPS5747124A (en) 1982-03-17
DE2231658A1 (en) 1973-01-18
BR7204236D0 (en) 1973-05-10
IT958523B (en) 1973-10-30
CA964058A (en) 1975-03-11
BE785513A (en) 1972-10-16
DE7224179U (en) 1976-09-23
JPS55165481A (en) 1980-12-23
FR2199858A5 (en) 1974-04-12
HK52479A (en) 1979-08-10
JPS5532996B1 (en) 1980-08-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years