DE1903455A1 - Fluessige Zusammensetzungen zum Schneiden von Metallen - Google Patents
Fluessige Zusammensetzungen zum Schneiden von MetallenInfo
- Publication number
- DE1903455A1 DE1903455A1 DE19691903455 DE1903455A DE1903455A1 DE 1903455 A1 DE1903455 A1 DE 1903455A1 DE 19691903455 DE19691903455 DE 19691903455 DE 1903455 A DE1903455 A DE 1903455A DE 1903455 A1 DE1903455 A1 DE 1903455A1
- Authority
- DE
- Germany
- Prior art keywords
- occur
- load
- properties
- cutting metals
- maximum load
- 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.)
- Withdrawn
Links
- 239000000203 mixture Substances 0.000 title claims description 12
- 239000007788 liquid Substances 0.000 title claims description 9
- 238000005520 cutting process Methods 0.000 title claims description 7
- 229910052751 metal Inorganic materials 0.000 title claims description 6
- 239000002184 metal Substances 0.000 title claims description 6
- 150000002739 metals Chemical class 0.000 title claims description 6
- 239000003921 oil Substances 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 5
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 5
- 239000011609 ammonium molybdate Substances 0.000 claims description 5
- 229940010552 ammonium molybdate Drugs 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 2
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 2
- 150000001642 boronic acid derivatives Chemical class 0.000 claims description 2
- 229920000151 polyglycol Polymers 0.000 claims description 2
- 239000010695 polyglycol Substances 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 1
- 150000001242 acetic acid derivatives Chemical class 0.000 claims 1
- 239000007789 gas Substances 0.000 claims 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 27
- 239000000839 emulsion Substances 0.000 description 13
- 229910021538 borax Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 6
- 239000004328 sodium tetraborate Substances 0.000 description 6
- 235000010339 sodium tetraborate Nutrition 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 3
- 235000010288 sodium nitrite Nutrition 0.000 description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000010730 cutting oil Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000010534 mechanism of action Effects 0.000 description 2
- 238000005555 metalworking Methods 0.000 description 2
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- GDTSJMKGXGJFGQ-UHFFFAOYSA-N 3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B([O-])OB2OB([O-])OB1O2 GDTSJMKGXGJFGQ-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000001166 anti-perspirative effect Effects 0.000 description 1
- 239000003213 antiperspirant Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 229910000104 sodium hydride Inorganic materials 0.000 description 1
- 239000012312 sodium hydride Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003464 sulfur compounds Chemical class 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M173/00—Lubricating compositions containing more than 10% water
- C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/02—Water
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/081—Inorganic acids or salts thereof containing halogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/082—Inorganic acids or salts thereof containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/082—Inorganic acids or salts thereof containing nitrogen
- C10M2201/083—Inorganic acids or salts thereof containing nitrogen nitrites
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/08—Inorganic acids or salts thereof
- C10M2201/084—Inorganic acids or salts thereof containing sulfur, selenium or tellurium
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/087—Boron oxides, acids or salts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
- C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
- C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/01—Emulsions, colloids, or micelles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Anti-Oxidant Or Stabilizer Compositions (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1193068 | 1968-01-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1903455A1 true DE1903455A1 (de) | 1969-08-28 |
Family
ID=11138720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691903455 Withdrawn DE1903455A1 (de) | 1968-01-24 | 1969-01-24 | Fluessige Zusammensetzungen zum Schneiden von Metallen |
Country Status (10)
Country | Link |
---|---|
AT (1) | AT292160B (en, 2012) |
BE (1) | BE727224A (en, 2012) |
CH (1) | CH509395A (en, 2012) |
DE (1) | DE1903455A1 (en, 2012) |
ES (1) | ES362990A1 (en, 2012) |
FR (1) | FR2000665B1 (en, 2012) |
GB (1) | GB1254504A (en, 2012) |
NL (1) | NL160327C (en, 2012) |
OA (1) | OA03341A (en, 2012) |
PL (1) | PL79947B1 (en, 2012) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0534090A1 (de) * | 1991-07-30 | 1993-03-31 | Chemische Betriebe Pluto GmbH | Schmiermittel zum Warmwalzen von Stahlprofilen in einem Walzgerüst |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6426095B2 (en) | 1990-05-24 | 2002-07-30 | Nisus, Corp. | Methods and compositions for retarding and eradicating infestation in trees and tree derived products |
DE19605162C1 (de) * | 1996-02-13 | 1997-09-18 | Elf Oil Deutschland Gmbh | Synthetisches Schmieröl und dessen Verwendung |
US11506079B2 (en) | 2019-09-09 | 2022-11-22 | Raytheon Technologies Corporation | Fluid diffusion device for sealed bearing compartment drainback system |
US11970972B2 (en) | 2019-10-23 | 2024-04-30 | Rtx Corporation | Windage blocker for oil routing |
US11719127B2 (en) | 2019-10-23 | 2023-08-08 | Raytheon Technologies Corporation | Oil drainback assembly for a bearing compartment of a gas turbine engine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE512934A (en, 2012) * | 1951-07-18 |
-
1969
- 1969-01-18 ES ES362990A patent/ES362990A1/es not_active Expired
- 1969-01-22 BE BE727224A patent/BE727224A/xx unknown
- 1969-01-23 PL PL1969131335A patent/PL79947B1/pl unknown
- 1969-01-23 CH CH122669A patent/CH509395A/fr not_active IP Right Cessation
- 1969-01-24 GB GB4287/69A patent/GB1254504A/en not_active Expired
- 1969-01-24 FR FR6901297A patent/FR2000665B1/fr not_active Expired
- 1969-01-24 NL NL6901180.A patent/NL160327C/xx not_active IP Right Cessation
- 1969-01-24 DE DE19691903455 patent/DE1903455A1/de not_active Withdrawn
- 1969-01-24 AT AT75969A patent/AT292160B/de not_active IP Right Cessation
- 1969-04-01 OA OA53578A patent/OA03341A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0534090A1 (de) * | 1991-07-30 | 1993-03-31 | Chemische Betriebe Pluto GmbH | Schmiermittel zum Warmwalzen von Stahlprofilen in einem Walzgerüst |
Also Published As
Publication number | Publication date |
---|---|
FR2000665B1 (en, 2012) | 1978-03-17 |
NL6901180A (en, 2012) | 1969-07-28 |
FR2000665A1 (en, 2012) | 1969-09-12 |
CH509395A (fr) | 1971-06-30 |
NL160327B (nl) | 1979-05-15 |
BE727224A (en, 2012) | 1969-07-01 |
ES362990A1 (es) | 1971-02-16 |
GB1254504A (en) | 1971-11-24 |
NL160327C (nl) | 1979-10-15 |
PL79947B1 (en, 2012) | 1975-08-30 |
OA03341A (fr) | 1970-12-15 |
AT292160B (de) | 1971-08-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3008500C2 (en, 2012) | ||
DE2043885B2 (de) | Schmiermittel für die spanende und spanlose Bearbeitung von Metallwerkstoffen | |
DE2549402C3 (de) | Schmiermittel für die Bearbeitung von Aluminium | |
DE2042279A1 (de) | Verfahren zum Schmieren von Aluminium und Aluminiumlegierungen | |
DE977492C (de) | OElfreie, waesserige Schmier-, Schneid- und Kuehlfluessigkeit fuer die spanabhebende Metallbearbeitung | |
DE1903455A1 (de) | Fluessige Zusammensetzungen zum Schneiden von Metallen | |
DE2310590A1 (de) | Schmierfette | |
DE1063311B (de) | Schmieroel | |
DE1270724B (de) | Verwendung von Olefinen oder Mischungen von Olefinen als Schmiermittel zur spanlosen und spanabhebenden Bearbeitung von Aluminium | |
DE1273103B (de) | Schmieroel | |
DE1769332A1 (de) | Schmieremulsion zum Metallwalzen | |
DE851237C (de) | Schmier- bzw. Poliermittel | |
DE1903455C (de) | Metallbearbeitungsflüssigkeiten | |
DE1903453C (de) | Metallbearbeitungsflüssigkeiten | |
DE2000035A1 (de) | Kuehlschmiermittel fuer die zerspanende Metallbearbeitung | |
DE550871C (de) | Verfahren zur Verhinderung der Rostbildung auf Metallen durch Verwendung von Bohroelen oder Bohrfetten in stark verduennter, waesseriger Emulsion | |
DE2609666C3 (de) | Schmier- und Kühlmittel für die Metall- und Kunststoffbearbeitung | |
DE1903455B (de) | Metallbearbeitungsflussigkeiten | |
DE1644912C3 (de) | Emulgierbare Metallbearbeitungs olzusammensetzung | |
DE928194C (de) | Schmierstoffzusatzmittel | |
DD213692A5 (de) | Verfahren zur haertung von eisenlegierungen im waessrigen medium | |
DE2130711C3 (de) | Metallbearbeitungsschmiermittel | |
DE856685C (de) | Hilfsfluessigkeit fuer die Metallbearbeitung | |
AT403164B (de) | Verwendung von alkali- und/oder triethanolaminsalzen der alkanoylamidocarbonsäuren in der metallbearbeitung | |
DE930649C (de) | Waessrige Schneidloesungen |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 | ||
8339 | Ceased/non-payment of the annual fee |