SE419637B - Torr, eldfast cement for formning av foglosa infodringar, tillpackad eller vibrerad pa plast i en metallsmeltugn - Google Patents
Torr, eldfast cement for formning av foglosa infodringar, tillpackad eller vibrerad pa plast i en metallsmeltugnInfo
- Publication number
- SE419637B SE419637B SE7904659A SE7904659A SE419637B SE 419637 B SE419637 B SE 419637B SE 7904659 A SE7904659 A SE 7904659A SE 7904659 A SE7904659 A SE 7904659A SE 419637 B SE419637 B SE 419637B
- Authority
- SE
- Sweden
- Prior art keywords
- alumina
- cement
- aluminum
- magnesium oxide
- amount
- Prior art date
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
- C04B35/65—Reaction sintering of free metal- or free silicon-containing compositions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00939—Uses not provided for elsewhere in C04B2111/00 for the fabrication of moulds or cores
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Ceramic Products (AREA)
- Powder Metallurgy (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Description
_~790l|659~5 10 15 2 partikeldiameter av l0,am eller mindre, helst S/fm eller mindre.
Eldfasta korn av-aluminiumoxid, magnesiumoxid, magnesiumoxid-krom- oxid och spinell är att föredraga. Blandningar av dessa material kan an- vändas. När nersmälta spinellkorn (Mg02 Al¿03) användes, är detlönskvärt att blanda i reaktiv finmalm av aluminiumoxid och magnesiumoxid,vilka. på stället ger spinell vid bränning, känt enligt tidigare teknik, vilket hjälper till att göra fodringen tät. Det aluminium som användes i smält- ugnen (eller vid en föregående upphettning), oxideras till gamma-aluminium- oxid och ökar i volym. Detta resulterar i en minskad porositet och det an- tages också att metallens förbränningsvärme hjälper till vid sintringen.
I varje fall har de fodringarna, som formats av blandningar enligt upp- finningen,högre livslängd ochllägre porositet än motsvarande formade av blandningar utan aluminiumpulver._ Den maximala mängd aluminiumpulver som kan användas enligt uppfinning- en bestämmes av cementens porvolym och hur mycket aluminium expanderar när det oxideras. För aluminiumoxidblandningar är ca l0 % den maximala tillåtna viktsprocenten och i allmänhet är l5 volyms-% denövre gränsen.
De mest användbara eldfasta kornen för infodring av metallsmältugnar, enligt uppfinningenär aluminiumoxid,magnesiumoxid, magnesiumoxid-kromoxid, 20 magnesiumoxid-aluminiumoxidspinell och aluminiumoxid-kromoxid. Allmänt mind- 25 30 35 re användbara är fodringar avldseldioxid,kise1karbid, muïlit, zirkgn Qch g zirkoniumoxid. g .
Nedanstående icke begränsande exempel har företrädesvis följande sam- mansättning (alla procenttal anger vikts-%): smält alminiumoxid, 1,2 - 4,8 mm 38 % smält aluminiumoxid, 44 m - l,2 mm 25 % smält aluminiumoxid belagd med 4 vikts-% glas (anna: u.s. Patent s.79s.o4o), där de belagda partiklarna har en storlek av mellan 0 0,l6 och 0,7 mm 20 % råkyanit, 0,076 - 0,089 mm 20 % aluminiumpulver, 0,076 mm 5 % kiselkarbidpulver, 0,076 mm 5 % metallpulver av aluminium, 4,5/um diameter 3 % borsyra l % För att karakterisera och undersöka en del av dess egenskaper, blan- dades ovan nämnda ämnen samman till en fodring i en metallsmältugn och delar av fodringen undersöktes. Den, under värme,bildade cementen hade en porosi- a 7904659-5 3 ._.s. ._ . , . .. _ _ tet (de öppna porernas volym) på l7 % och en medeltäthet av 3,2 g/cm3.
Utan tillsats av aluminium, hade cementen efter formning i metallsmält- ugnen en porositet pá 20 % och en densitet på 3,0 g/cm3.
Cementen, innehållande aluminiumpulver, testades i en kärnlös smält- 5 ugn.för recirkulerat stål. Tidigare hade ingen cement, såväl de baserade på kiseldioxid, zirkon, magnesiumoxid som på aluminiumoxid, varit hållbar i denna omgivningen mer än en vecka, Samtliga blev obrukbara på grund av allvarlig erosion, metallgenomträngning.
Nedan ges ett exempel på en spinellblandning: l0 smält spinell, 4, mm och finare 86 % smält Mg0, 0,l5 mm och finare 4 % smält Al203, 0,076 mm och finare 4 % finkornig kalcinerad Bayeraluminiumoxid A 2 % aluminiumpulver, 4,5 nun 3 % l5 borsyra, finfördelad l % Följande är ett exempel på smält Mg0-blandning: smält Mg0, 0,165 mm - 3,4 mm 63 % smält Mg0, 0,15 mm och finare l7 % smält MgO, 0,076 mm och finare l5 % 20 smält aluminiumoxid, 0,076 mm och finare 2 % aluminiumpulver, 4,um och finare 3 % borsyra (finfördelad) ' 0,5 % Som framgår av ovanstående exempel, kan ett lågtemperaturflussmedel vara närvarande i en sä liten mängd som l/2 vikts-% normalt användes aldrig 25 mer än 5 % av ett dylikt flussmedel och alternativt kan lågtemperaturflussmedlet helt uteslutas, se nedan.
Ett exempel på tillverkning och behandling av en blandning utan något lâgtemperaturflussmedel ges nedan.
Sammansättning: 30 Material Storlek VíktS-% Al203-aggregat 94,5 % renhetsgrad 3,4 mm 0Ch finare 60 Al203-aggregat 99,5 % renhetsgrad 0;70 mm 0Ch fifläše 30 Al203, finmalen 99,8 % renhetsgrad 0,076 mm 0Ch finêre 4 Si02-aggregat 99,0 % renhetsgrad 0-15 mm OCH finare 3 35 Aluminiumpulver 4;Lm Behandling: Installering - Vibreras på plats med formar _ Bränningsschema - l. Höj temperaturen till 204°C, med 38°C per timme. 2. Håll temperaturen vid 20400 under l timme 7904659-s 4 3. Höj temperaturen till 53808, med 15006 per timme 4. HâH temperaturen vid 538°C under 1 time
Claims (3)
1. 0 15 '7904659-5 PATENTKRAV l. Torr, eldfast cement för formning av foglösa infodringar, tillpackad eller vibrerad på plats i en metallsmältugn, varvid cementen innefattar grova, mellanstora och fina partiklar av ett kristallint, eldfast material som utgöres av aluminiumoxid, aluminiumoxid-kromoxid, zirkoniumoxid, spinell, kiseldioxid, kiselkarbid, magnesiumoxid-kromoxid, zirkon, mullit. magnesiumoxid eller bland- ningar därav; upp till 5 % ett làgtemperaturflussmedel; och finkornig aluminium, k ä n n e t e c k n a d av att aluminiumpartiklarna har en partikelstorlek av l0 eller mindre och är tillräckligt finfördelad för att oxideras till aluminium- oxid på plats medan smältugnen är i drift, varvid aluminiummetallen är närvarande i en så liten mängd att ingen elektrisk strömgenomgång sker genom den tillpackade, eldfasta blandningen och att inte den tillpackade blandningens porer fylles igen fullständigt, när aluminium oxideras till aluminiumoxid, och är närvarande i en mängd av minst l volyms-% och högst _l5 volyms-%, av den totala blandningen av fast- ämnen.
2. Cement enligt krav l, k ä n n e t e c k n a d av minst ett flussmedel, som utgöres av glas, lera eller borsyra i en mängd av upp till 5 vikts-%.
3. Cement enligt krav l, k ä n ne t e c k na d av att det kristallina, eld- fasta materialet är aluminiumoxid, magnesiumoxid eller spinell. _j79ouss9-s SAMMANDRAG a En eïdfast, tilïpackad bïandning för fodring av behâHare för metallsmäïtníng, som ínnehäfler sorterade, eïdfasta korn med en storlek vald för att minimera porositgten samt tiïïsatsen av -sintríngs- och fïuss- medel, och aïuminiumpuïver 1' en mängd av 1 - 15 vo1yms-%.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84212777A | 1977-10-14 | 1977-10-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7904659L SE7904659L (sv) | 1979-05-29 |
SE419637B true SE419637B (sv) | 1981-08-17 |
Family
ID=25286586
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7904659A SE419637B (sv) | 1977-10-14 | 1979-05-29 | Torr, eldfast cement for formning av foglosa infodringar, tillpackad eller vibrerad pa plast i en metallsmeltugn |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS54500010A (sv) |
AU (1) | AU520517B2 (sv) |
DE (1) | DE2857083C1 (sv) |
ES (1) | ES474219A1 (sv) |
FR (1) | FR2405909A1 (sv) |
GB (1) | GB2023568B (sv) |
IT (1) | IT1160860B (sv) |
SE (1) | SE419637B (sv) |
WO (1) | WO1979000214A1 (sv) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3439954A1 (de) * | 1984-11-02 | 1986-05-07 | Didier-Werke Ag, 6200 Wiesbaden | Feuerfestes verschleissteil zum vergiessen fluessiger schmelzen |
WO1990013526A1 (en) * | 1989-04-28 | 1990-11-15 | Kazakhsky Mezhotraslevoi Nauchno-Tekhnichesky Tsentr Svs | Refractory material |
CN1078224A (zh) * | 1992-03-06 | 1993-11-10 | 特殊耐火材料公司 | 可振动的耐火材料组合物 |
US6103651A (en) * | 1996-02-07 | 2000-08-15 | North American Refractories Company | High density ceramic metal composite exhibiting improved mechanical properties |
CN108530041B (zh) * | 2018-04-13 | 2021-08-10 | 华南理工大学 | 一种高纯高强氧化铝陶瓷及其低温制备方法 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3322551A (en) * | 1967-05-30 | Refractory and method | ||
GB402203A (en) * | 1932-08-26 | 1933-11-30 | British Refractories Res Ass | Improved method of producing a coating of an oxide |
DE644923C (de) * | 1934-10-03 | 1937-05-18 | Hans Momburg | Verfahren zum Ausbessern und Instandhalten von erhitzten Boden-, Wand- und Deckenflaechen von OEfen und Feuerungsanlagen |
US2283250A (en) * | 1936-05-18 | 1942-05-19 | Goldschmidt Victor Moritz | Manufacture of refractory materials |
US2331232A (en) * | 1940-07-13 | 1943-10-05 | Donald W Ross | Method of making refractories |
DE903437C (de) * | 1944-02-29 | 1954-02-04 | Magnesital G M B H | Verfahren zur Herstellung raumbestaendiger Magnesitsteine |
AT171429B (de) * | 1950-03-08 | 1952-05-26 | Oesterr Amerikan Magnesit | Ungebrannte Magnesit- oder Dolomitsteine oder -massen |
AT205055B (de) * | 1958-05-16 | 1959-09-10 | Veitscher Magnesitwerke Ag | Verfahren zur Durchführung örtlicher Reparaturen am heißen, feuerfesten Mauerwerk |
GB1030865A (en) * | 1961-08-02 | 1966-05-25 | Alfred Gordon Evans Robiette | Ceramic materials |
BE740586A (sv) * | 1968-10-23 | 1970-04-01 | ||
US3775139A (en) * | 1970-10-26 | 1973-11-27 | Olin Corp | Non-ferrous refractory composition having improved resistance to molten non-ferrous metals and slags |
US3793040A (en) * | 1972-01-28 | 1974-02-19 | Norton Co | Refractory cement |
JPS5631313B2 (sv) * | 1974-10-07 | 1981-07-20 |
-
1978
- 1978-10-13 GB GB7916453A patent/GB2023568B/en not_active Expired
- 1978-10-13 FR FR7829301A patent/FR2405909A1/fr active Pending
- 1978-10-13 DE DE2857083A patent/DE2857083C1/de not_active Expired
- 1978-10-13 JP JP50005878A patent/JPS54500010A/ja active Pending
- 1978-10-13 WO PCT/US1978/000114 patent/WO1979000214A1/en unknown
- 1978-10-14 ES ES474219A patent/ES474219A1/es not_active Expired
- 1978-10-16 IT IT69374/78A patent/IT1160860B/it active
- 1978-10-16 AU AU40731/78A patent/AU520517B2/en not_active Expired
-
1979
- 1979-05-29 SE SE7904659A patent/SE419637B/sv unknown
Also Published As
Publication number | Publication date |
---|---|
DE2857083A1 (en) | 1981-01-29 |
DE2857083C1 (de) | 1982-06-24 |
IT1160860B (it) | 1987-03-11 |
ES474219A1 (es) | 1979-04-01 |
JPS54500010A (sv) | 1979-08-16 |
SE7904659L (sv) | 1979-05-29 |
AU4073178A (en) | 1980-04-24 |
GB2023568B (en) | 1982-04-21 |
FR2405909A1 (fr) | 1979-05-11 |
GB2023568A (en) | 1980-01-03 |
IT7869374A0 (it) | 1978-10-16 |
WO1979000214A1 (en) | 1979-04-19 |
AU520517B2 (en) | 1982-02-04 |
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