EP0258343A1 - New anticorrosive pigments, preparation and utilization thereof - Google Patents
New anticorrosive pigments, preparation and utilization thereofInfo
- Publication number
- EP0258343A1 EP0258343A1 EP87901433A EP87901433A EP0258343A1 EP 0258343 A1 EP0258343 A1 EP 0258343A1 EP 87901433 A EP87901433 A EP 87901433A EP 87901433 A EP87901433 A EP 87901433A EP 0258343 A1 EP0258343 A1 EP 0258343A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pigments
- weight
- dichromate
- pigment
- chromate
- 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- Withdrawn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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/40—Compounds of aluminium
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0003—Compounds of molybdenum
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0081—Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0081—Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound
- C09C1/0084—Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound containing titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/04—Compounds of zinc
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/22—Compounds of iron
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3692—Combinations of treatments provided for in groups C09C1/3615 - C09C1/3684
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/08—Treatment with low-molecular-weight non-polymer organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Definitions
- the object of the present invention is to develop environmentally friendly, in particular occupationally less harmful corrosion protection pigments which are able to replace zinc and strontium chromate, especially in base coats for different metal substrates.
- Chromic acid can be improved significantly.
- the invention accordingly relates to metal oxide
- -phosphate and / or molybdate-containing corrosion protection pigments preferably basic metal phosphate and molybdate pigments based on the metals zinc, aluminum, iron, barium, strontium, calcium, magnesium and titanium, individually or in combination, in addition to metal oxide,
- Metal phosphate and / or metal molybdate has a soluble sodium dichromate content of 0.03-2% by weight, preferably 0.2-0.6% by weight, or equivalent amounts of potassium or ammonium dichromates or equivalent amounts of the corresponding Chromates or chromic acid, based on the total weight of the pigment.
- the combination for example the basic metal phosphate pigments with the soluble alkali metal or ammonium dichromate or the corresponding chromate or chromic acid, has proven to be particularly effective according to the invention if it combines with the pigment sludge of the base pigment after the chemical reaction and wet confectioning are thoroughly mixed before drying, in particular using shear forces. In this way, the uniform distribution of the dissolved chromate component required for optimum effectiveness can be achieved.
- the uniform and optimal distribution of the chromate component in the pigment or in a pigment combination . n is also possible by dry mixing the components, but subsequent intensive grinding, for example in a pin, turbo or jet mill, is necessary.
- This preparation of the dried pigment can also be advantageous if the chromate components are added to the wet pigment before drying. In both cases, final screening to achieve fractions with certain particle sizes can be advantageous for certain applications.
- a further advantageous variant of the combination of the corrosion protection pigment with the chromate components mentioned is to add pigments and / or fillers such as titanium dioxide, barium sulfate or talcum etc. to the pigment sludge before drying or the dried pigment after addition of the chromate components mentioned usually used in the formulation of primers.
- the pigments and filler components can also be added before the soluble chromate components are added.
- the amount of such additives is preferably 5 to 20% by weight, in particular 15 to 20% by weight, of the total pigment. -4- l According to a preferred embodiment, the
- Example 1 basic zinc phosphate is prepared and this is then in the aqueous slurry at a temperature of 70 - 90 ° C with an almost boiling solution of 0.8 wt .-% (based on dry pigment) phthalic anhydride and 10 parts of water for a period of 30 min.
- the product separated by filtration is mixed with 0.3% by weight (based on dry pigment) of sodium dichromate, this is mixed in uniformly in an intensive mixer and then the pigment sludge is dried at 105 ° C. and the dried product is then ground or marry and sighted.
- Example 2 basic zinc phosphate is prepared, then phthalic acid or phthalic anhydride is added in the manner described, 10% by weight (based on dry pigment) barium sulfate and 10% by weight (based on dry pigment) talc are then added and after the addition from 0.4. % By weight (based on dry pigment) sodium dichromate is mixed intensively. The pigment sludge obtained is then dried at 105 ° C. and the dried product is then ground or ground and classified.
- the basic zinc phosphate prepared according to Example 3 with barium and talc is dried (without the addition of dichromate) at 105 ° C. and, after dry preparation, 0.4 wt.% Ammonium dichromate is added in a mixer and the intensively premixed product is then added grind on a turbo mill.
- Epoxy resin epoxy equivalent weight 450-525
- Epoxy resin epoxy equivalent weight 450-525
- Epoxy resin (epoxy equivalent weight 175-185) 8.4 Organically modified ontmorinonite 1.15
- PV / KPVK (critical pigment volume concentration) 0.7
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
Des pigments anti-corrosifs contenant des oxydes métalliques, des phosphates métalliques et/ou du molybdate à base de métaux zinc, aluminium, fer, baryum, strontium, calcium, magnésium et titane, isolés ou associés, contiennent en outre entre 0,03 et 2% en poids de bichromate de sodium soluble ou d'une quantité équivalente de bichromate de potassium ou d'ammonium ou des quantités équivalentes des chromates ou acides chromiques correspondants. Ces pigments sont préparés par homogénéisation totale des parties chromates et ils sont utilisés comme apprêt sur des fonds métalliques ferreux ou non ferreux.Anti-corrosive pigments containing metal oxides, metal phosphates and / or molybdate based on zinc, aluminum, iron, barium, strontium, calcium, magnesium and titanium, isolated or combined, contain in addition between 0.03 and 2% by weight of soluble sodium dichromate or an equivalent quantity of potassium or ammonium dichromate or equivalent quantities of the corresponding chromates or chromic acids. These pigments are prepared by total homogenization of the chromate parts and they are used as a primer on ferrous or non-ferrous metallic bases.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3605526 | 1986-02-20 | ||
DE19863605526 DE3605526A1 (en) | 1986-02-20 | 1986-02-20 | NEW CORROSION PROTECTION PIGMENTS AND THEIR PRODUCTION AND APPLICATION |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0258343A1 true EP0258343A1 (en) | 1988-03-09 |
Family
ID=6294579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87901433A Withdrawn EP0258343A1 (en) | 1986-02-20 | 1987-02-13 | New anticorrosive pigments, preparation and utilization thereof |
Country Status (6)
Country | Link |
---|---|
US (1) | US4840668A (en) |
EP (1) | EP0258343A1 (en) |
JP (1) | JPS63502597A (en) |
AU (1) | AU7039587A (en) |
DE (1) | DE3605526A1 (en) |
WO (1) | WO1987005040A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3731737A1 (en) * | 1987-09-21 | 1989-03-30 | Heubach Hans Dr Gmbh Co Kg | CORROSION PROTECTION PIGMENTS BASED ON ERDALKALIHYDROGEN PHOSPHATES |
DE3813335A1 (en) * | 1988-04-21 | 1989-11-02 | Basf Ag | METAL OXIDE COATED ALUMINUM PIGMENTS |
US5244956A (en) * | 1988-08-09 | 1993-09-14 | Lockheed Corporation | Corrosion inhibiting coating composition |
AT404182B (en) * | 1993-06-03 | 1998-09-25 | Ica Innoconsult Ag | CORROSION PROTECTION METHOD FOR COMBUSTION PLANTS |
US5993523A (en) * | 1998-06-05 | 1999-11-30 | Silberline Manufacturing Co., Inc. | Inhibited metal pigment pastes containing molybdate pigments and suitable for aqueous coating compositions |
CA2453005A1 (en) * | 2003-12-17 | 2005-06-17 | Fermag Inc. | Hydrometallurgical process for separating steel mill dust using an arc furnace and pigments obtained by the process |
JP4313750B2 (en) * | 2004-11-04 | 2009-08-12 | 新日本製鐵株式会社 | Steel columns with corrosion protection at the buried underground |
US8016935B2 (en) * | 2005-06-17 | 2011-09-13 | Ferrinov Inc. | Anti-corrosion pigments coming from dust of an electric arc furnace and containing sacrificial calcium |
US8322754B2 (en) | 2006-12-01 | 2012-12-04 | Tenaris Connections Limited | Nanocomposite coatings for threaded connections |
AR100953A1 (en) | 2014-02-19 | 2016-11-16 | Tenaris Connections Bv | THREADED PIPE FOR AN OIL WELL PIPING |
DE102014119472A1 (en) | 2014-12-22 | 2016-06-23 | Leibniz-Institut Für Neue Materialien Gemeinnützige Gmbh | Process for the preparation of anisotropic zinc phosphate particles and zinc metal mixed phosphate particles and their use |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1082C (en) * | 1877-08-27 | E. LANGEN in Köln | Method of producing hard white sugar using the centrifuge | |
DE667135C (en) * | 1934-07-01 | 1938-11-04 | Axel Viggo Blom Dr | Anti-rust paint containing chromium compounds |
US2172505A (en) * | 1935-12-16 | 1939-09-12 | Henry A Gardner | Pigment and process for preparing the same |
DE747780C (en) * | 1939-01-21 | 1944-10-13 | Manufacture of anti-corrosive pigments | |
US3248251A (en) * | 1963-06-28 | 1966-04-26 | Teleflex Inc | Inorganic coating and bonding composition |
US3443977A (en) * | 1967-11-13 | 1969-05-13 | Pfizer & Co C | Anticorrosion pigments |
US3963472A (en) * | 1969-06-27 | 1976-06-15 | Union Oil Company Of California | Process for preventing corrosion by incorporative soluble metal chromates in fertilizer solutions |
US3656975A (en) * | 1970-02-16 | 1972-04-18 | Teleflex Inc | Coating composition |
US3969127A (en) * | 1972-07-07 | 1976-07-13 | The Sherwin-Williams Company | Molybdate corrosion inhibiting pigment and method for preparing same |
US3874883A (en) * | 1972-07-07 | 1975-04-01 | American Metal Climax Inc | Corrosion inhibiting pigment and method of making same |
US4017315A (en) * | 1975-06-27 | 1977-04-12 | Amax Inc. | Molybdate-phosphate corrosion inhibiting pigment |
DE3046697A1 (en) * | 1980-12-11 | 1982-07-15 | Goslarer Farbenwerke Dr. Hans Heubach GmbH & Co KG, 3394 Langelsheim | CORROSION PROTECTION PIGMENTS AND THEIR USE IN PAINTING AGENTS |
CA1162727A (en) * | 1981-12-11 | 1984-02-28 | Wigo Haacke | Anti-corrosion pigments and their use in paints |
-
1986
- 1986-02-20 DE DE19863605526 patent/DE3605526A1/en active Granted
-
1987
- 1987-02-13 AU AU70395/87A patent/AU7039587A/en not_active Abandoned
- 1987-02-13 US US07/116,723 patent/US4840668A/en not_active Expired - Fee Related
- 1987-02-13 EP EP87901433A patent/EP0258343A1/en not_active Withdrawn
- 1987-02-13 WO PCT/EP1987/000071 patent/WO1987005040A1/en not_active Application Discontinuation
- 1987-02-13 JP JP62501514A patent/JPS63502597A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO8705040A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1987005040A1 (en) | 1987-08-27 |
JPS63502597A (en) | 1988-09-29 |
AU7039587A (en) | 1987-09-09 |
DE3605526A1 (en) | 1987-08-27 |
US4840668A (en) | 1989-06-20 |
DE3605526C2 (en) | 1989-10-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
17P | Request for examination filed |
Effective date: 19880226 |
|
17Q | First examination report despatched |
Effective date: 19890524 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19900103 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GAWOL, MANFRED Inventor name: ADRIAN, GERHARD |