EP0150547A1 - Onyximitationsprodukte und ihr Herstellungsverfahren - Google Patents

Onyximitationsprodukte und ihr Herstellungsverfahren Download PDF

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Publication number
EP0150547A1
EP0150547A1 EP84300577A EP84300577A EP0150547A1 EP 0150547 A1 EP0150547 A1 EP 0150547A1 EP 84300577 A EP84300577 A EP 84300577A EP 84300577 A EP84300577 A EP 84300577A EP 0150547 A1 EP0150547 A1 EP 0150547A1
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EP
European Patent Office
Prior art keywords
resin
resin portion
cultured
hardened
onyx
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.)
Granted
Application number
EP84300577A
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English (en)
French (fr)
Other versions
EP0150547B1 (de
Inventor
Theodore E. Stevens
Gilbert B. Ross
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT84300577T priority Critical patent/ATE56399T1/de
Priority to DE8484300577T priority patent/DE3483208D1/de
Priority to EP84300577A priority patent/EP0150547B1/de
Publication of EP0150547A1 publication Critical patent/EP0150547A1/de
Application granted granted Critical
Publication of EP0150547B1 publication Critical patent/EP0150547B1/de
Priority to HK213/91A priority patent/HK21391A/xx
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F9/00—Designs imitating natural patterns
    • B44F9/04—Designs imitating natural patterns of stone surfaces, e.g. marble

Definitions

  • This invention has to do with products simulative in appearance to the naturally occurring semi-precious silicas known as onyx, or to like minerals such as marble. More particularly, the invention is concerned with novel materials and methods and mineral simulative products resulting therefrom, characterized by enhanced fidelity to natural materials in appearance, in improved resistance to deterioration in their expected use environment, reduced weight for lower cost shipping, and in versatility of design confirguration. Moreover the present materials, methods and products are achieved at significant reductions in manufacturing costs by virtue of the elimination of various manufacturing steps heretofore thought necessary in the cultured onyx and cultured marble industry. In the ensuing description, cultured onyx will be primarily referred to as an ideal illustrative embodiment of the practice of the invention.
  • Another highly important object is to provide cultured marble or onyx simulative shaped articles and products such as tubs, tub enclosures, lavabos, pullmans, basins and vases, fixtures, fountains and the like which are free of internal hygroscopicity inducing agents such as glass and which thereby are impervious to humid environments or water contact and able to be free of gel coats whereby unsightly lifting of film at the product surface is avoided and the aesthetic and practical use life of the product greatly extended.
  • Still other objectives include having like density components against gravity separation in lay-up, deriving the matrix and filler portions from the same resin, preferably a polyester resin, with each portion being hardened in a separate step, and the provision of a universal filler system comprising neutral color resin particles triturated to the proper size range and used with individual coloration in the matrix resin which is only then cured with the filler cooperating with the colorant, or more broadly the contrastant, since apparently similar colors of matrix and filler are distinguishable as optically varying when the particles of filler are distributively disposed in locally concentrated relation in the surrounding, product shape defining resin.
  • Further objectives include providing methods of molding shaped products, methods of preparing intermediates, and techniques for obtaining the optimum in cultured onyx and like mineral product appearance with maximum beneficial physical and chemical properties, and the provision of products having water receiving receptacles and conduit therein, and with all the appearance of onyx, marble and like naturally occurring materials, but of infinitely variable shape and utility.
  • a shaped structure having a polishable cultured onyx, cultured marble, or like mineral-appearing surface of predetermined hardness, the structure comprising a locally discontinuous phase comprising a synthetic organic resin portion hardened to the predetermined hardness and a visually distinguishable continuous phase comprising a synthetic organic resin portion separately hardened to the predetermined hardness with the discontinuous phase intimately distributed therein, whereby the structure surface is simulative of onyx or like mineral appearance and uniformly polishable in phase undifferentiated relation.
  • the locally discontinuous resin portion typically comprises particles of resin hardened to the predetermined hardness prior to intimate combination with the continuous resin portion and which are less than about 50 U.S. mesh in mean average particle size diameter.
  • the discontinuous resin portion particles preferably comprise polyester resin.
  • the continuous resin portion also preferably comprises polyester resin and embeds the discontinuous portion in local discontinuity and distribution defining relation.
  • the locally discontinuous resin portion particles of hardened resin may have a mean average particle size diameter less than about 80 U.S. mesh.
  • the discontinuous resin portion particles comprise from about 5% to 55% of the weight of the structure.
  • the continuous resin portion and the discontinuous portion are each polymers of the same monomer, e.g. each polyester resin.
  • the structure typically also includes a colorant distinguishable within the continuous phase, e.g. dispersed nonuniformly in continuous phase. Further the discontinuous phase is typically particulate, uniformly distributed in the continuous phase, and the structure also includes a colorant nonuniformly dispersed in the continuous phase.
  • the invention contemplates provision of a moldable mixture hardenable into the foregoing product, i.e., a resinous mass for the production of cultured onyx, cultured marble, or like mineral product comprising visually distinguishable portions of synthetic organic resin, including a first, major weight portion defining a continuous, moldable and hardenable resin matrix, a second, minor weight portion defining a particulate, pre-hardened resin filler of less than about 50 U.S.
  • the second resin portion particles having discontinuous distribution in the first resin portion matrix, and a colorant visually distinguishably marking the product with randomly localized zones of distributed filler concentration, the zones having indistinct mergence with the surrounding matrix in three dimensions after mold-shaping and hardening of the matrix portion simulatively of the surface appearance of onyx, cultured marble, or like mineral.
  • the second resin portion typically constitutes from 25% to 50% by weight of the resinous mass, and the first portion or matrix is hardenable with the filler in situ to the hardness of the filler to have both filler and matrix portions which may be polymers of the same monomer substantially equally wear resistant to polishing on the product surface.
  • This intermediate comprises resinous particles for the production of cultured onyx, cultured marble, or like mineral product by combination in effective proportion with visually distinguishable synthetic organic resin, the resinous particles comprising polyhedral chips of a relatively large, hardened mass of synthetic organic resin, the particles being useful without further hardening, preferably comprised of polyester, and having a mean average particle after being chipped from the relatively large mass e.g. under low temperature conditions, may have a colorant added, where the large mass is not of a visually distinctive color tone relative to the tone of the intended matrix resin portion, e.g. by incorporation of colorant for visually distinguishing the particles relative to the sythetic organic resin matrix.
  • the combining of the foregoing particulate filler with the hardenable matrix, into the blend described above produces after molding to a desired shape a shaped cultured onyx, cultured marble, or like mineral-appearing product having a predetermined surface hardness and comprising first and second, visually distinguishable portions of synthetic organic resin, including a first, major weight portion defining a continuous, molded post-hardened resin matrix, a second, minor weight portion defining a particulate, pre-hardened resin filler of less than about 50 U.S.
  • the second resin portion particles comprising polyhedral chips of a relatively large hardened resin mass and having discontinuous distribution in the first resin portion matrix in a manner visually marking the product with distributed filler having indistinct mergence with the surrounding matrix in three dimensions simulatively of the appearance of onyx, cultured marble, or like mineral.
  • a colorant may be nonuniformly distributed in the resin matrix to enhance the simulative effect
  • the locally discontinuous resin portion chips may be colored with added colorant, comprise polyester resin, and be less than about 80 U.S. mesh in mean average particle size diameter; the continuous resin portion may also comprise polyester resin, e.g.
  • the continuous and discontinuous portions may be polymers of the same monomer, and embed the discontinuous portion and colorant in local discontinuity and distribution defining relation; and the discontinuous resin portion particle chips typically comprise from about 25% to 55% of the weight of the product, and may be artifically colored.
  • the shaped product includes means defining a passage within the product, for the passage of water or other fluid, for receiving bolts, screws and other fastening hardware, or for defining a wall aperture for water flow or insertion of fixtures.
  • the shaped product passage defining means in faucet and piping applications with typically include a separately formed conduit member, e.g. brass tubing, the product further defining means to maintain the member within the passage, such as end fittings adapted to be sweated onto the brass tubing and to threadedly engage aerators and mounting bosses in product installations.
  • a separately formed conduit member e.g. brass tubing
  • the product further defining means to maintain the member within the passage, such as end fittings adapted to be sweated onto the brass tubing and to threadedly engage aerators and mounting bosses in product installations.
  • the invention also contemplates method of manufacturing a cultured onyx, cultured marble, or like mineral-appearing surface structure, which includes combining with a first hardenable synthetic organic resin portion a second pre-hardened particulate synthetic organic resin portion, the first resin portion being hardenable to a like hardness to the second resin portion, hardening the first resin portion with the second resin portion, hardening the first resin portion with the second resin portion distributively disposed in situ therein to the like hardness in the desired form of the structure.
  • the method further may include adding powdered, or liquid colorant, hardening the second resin portion in a relatively large mass and triturating the mass, after freezing to aid crushing, if desired, to obtain the desired amount of the desired size particulate.
  • the present method includes also hardening a polyester resin as the second resin portion, triturating the hardened resin portion to a particulate mass having an average mean particle size diameter of less than about 50 U.S. mesh and combining the second resin portion with a first resin portion comprising hardenable polyester resin; proportioning the first and second resin portions so that the said second resin portion constitutes from 25% to 50% of the structure by weight; depositing the combined resin portions into a structure-defining form prior to hardening of the first resin portion; adding locally concentrated marblizing colorant to the mixed portions and gently swirling or stirring to combine without mixing to define the onyx or marble simulative striations; and thereafter hardening the first resin portion with the prehardened second resin portion distributively disposed therein; maintaining a passage within the combined resins during hardening of the first resin into a structure; and disposing a performed, e.g. passage-defining element in the combined resins prior to hardening of the first resin to maintain a passage therewithin.
  • a performed e.
  • the invention contemplates the method of manufacturing a cultured onyx, cultured marble or like mineral-appearing structure, which includes confining in a forming zone a previously hardened, particulate polyester resin and a visually distinguishable, liquid, hardenable polyester resin in distributively commingled relation and colorant in such relative proportions and patterns as to provide an onyx, marble or other mineral simulative surface appearance, and hardening the hardenable portion while confining the resin within the zone, and the product made by the method.
  • a cultured onyx, cultured marble or like mineral-appearing product comprising a hardened resin matrix and a particulate filler distributed therein in visually varying relation
  • the filler comprises a separately hardened portion of a chemically like resin to the matrix resin, whereby the surface of the product is visually varied and compositionally uniform.
  • a cultured onyx, cultured marble, or like mineral-appearing structure filler comprising a synthetic organic resin portion, e.g. of polyester, hardened to a hardness desired in a final structure, and triturated to particulate form having a mean average particle size of less than 50 mesh, and having an added colorant if desired, for use in such product manufacture.
  • a synthetic organic resin portion e.g. of polyester
  • the method of manufacturing resinous particulate filler including forming a body of hardened resin, freezing the body, and thereafter locally impacting the body in body-fracturing relation, further reducing the fracture product by impact at below room temperature, and using nitrogen or carbon dioxide for either or both fracture and further reduction operations, as the source of cold therefor.
  • the present invention uses a resin portion as filler.
  • the resin filler is prepared by hardening a heat or catalytically curable liquid resin, such as polyester, or other resin as described below, in bulk to form a solid body of hardened resin.
  • the degree of hardening is not narrowly critical, with typical resin bodies being nor friable but trituratable by application of grinding or abrading force.
  • a body of hardened resin is tritureated to a fine power comprised of discrete particles of generally polygonal shape, by impacting at high centrifugal speed against circularly fixed teeth under temperature conditions conductive to embrittlement of the resin body so as to faciliate erosion of the body and generation of particulate.
  • a grind to at least 50 U.S. mesh mean average particle size diameter is usually required for obtaining a cultured onyx product, although other minerals having coarser, even grainy striations may be made with coarser particulate, and grinding will not have to be so fine.
  • a mean average particle size of 80 U.S. and below is preferred for optimum subtlety of transition from accent to background in cultured onyx.
  • the hardened resin body is coarsely divided and the coarse pieces impacted against teeth until a particulate of the desired size distribution is realized.
  • the particulate filler may be the color of the resin body which in a polyester resin tends to be a water white to gray in the absence of added colorant.
  • a colorant i.e. a material imparting a color value other than the naturally occurring color, may be added to the resin, e.g. before hardening, for example an organic or inorganic dye and/or pigment, liquid or solid powder, may be added to a slurry of the polygonal chips in uncured resin or other vehicle prior to addition of the particulate to the matrix resin.
  • a masterbatch of chips may be prepared and specific colorants added as need be from time to time for product production purposes, thus to minimize inventory of colors.
  • the use of reactive color formers on the particulate is also practical, the color being developed in situ in the product.
  • the color may be any tone including deepened or lightened aspects of the eventual matrix color. In this connection, it is the presence of visual distinguishability through the presence of a contrast between the phases of the product that is important, not specific color contrasts.
  • the polyester resins for example exhibit contrast between commingled phases regardless of a colorant as an additional contrastant.
  • the hardened filler is then mixed with the matrix material, suitably a further portion of the filler resin.
  • Colorant to form localized concentrations of high contrast e.g. striations, bursts, veins, whorls, umbras and the like, typical of onyxand marble is added.
  • the mix is controllably agitated or not as desired to achieve the nonuniform, locally randomized, concentration pattern of distribution of colorant in the uniformly comixed filler and matrix. Swirling, agitating, adding from single or multiple points in thick or thin streams all have their effect on the final pattern.
  • the relative quantities of filler and matrix for achieving a cultured onyx appearance is between about 5% and 55% of filler on the total weight of the product, with the balance being matrix, colorant and any specific additives employed. Typically, colorant is added at the rate of about 0.1 to 1.5% of the total weight of the product.
  • product herein refers to the combination of two resin phases, without regard to colorants, contrastants, extenders, and nonresin components present in a final shaped structure. This ratio again is for achieving the best appearing cultured onyx product, other mineral simulations can use other ratios, e.g. from as little as 0.5% filler to as much as 75% filler by weight, based on the weight of the product, the matrix conversely comprising from 99.5% to as little as 25% by weight of the product.
  • a signal feature of the present invention is the cohardening of the matrix to the hardness of the filler or approximately so, to a degree affording a polishability to the filler and matrix phases at the product surface which is uniform across the phases.
  • both phases wear, or do not wear, but do so evenly and uniformly, so that islands of relatively harder filler do not protrude, as happens with glass frit fillers, as polishing progresses.
  • the filler and matrix wear at the same rate, i.e. without phase differentiation where the filler and matrix are hardened to the same degree.
  • Molding of the combined resin phases is accomplished simultaneously with the hardening of the matrix about the prehardened filler.
  • the final shape of the product is determined by the mold as in other molding processes.
  • the mold may typically define a tub or wash basin, or countertop or the like.
  • shaped articles of increased value relative to their resin content can be formed reliable and easily.
  • faucets and handles for operating water control valves can be readily molded of the present moldable combination of hardened and unhardened resin.
  • a faucet is depicted in Figs. 1 and 2.
  • the faucet F is shown to comprise a neck portion 16 and a base 24, the base being centrally recessed to receive a brass fitting 22 with the fitting annular shoulder 22a being embedded within the molded faucet for security of fit.
  • a conventional threaded conduit 28 extending from household plumbing (not otherwise shown) is threaded into the faucet fitting 22 at 26.
  • a preformed element in the form of a conduit 20 of plastic or brass extends through the faucet neck 16 defining a water passage 18 therethrough.
  • the conduit 20 is sweated to the fitting 22 at one end and to the fitting 32 at the faucet nozzle 30.
  • Nozzle fitting 32 is suitably molded in place and interiorly threaded at 36 to receive a conventional aerator.
  • the received preformed element can be any structure which leads a particular utility to the final molded product.
  • the knob 10 defines the handle and is provided with a central top recess 12 which receives for subsequent concealment under a hot/cold tab, a valve stem 14 through bushing 15 which is fitted in the central bore 17 of the handle.
  • Resins useful herein for formation of one or both of the two phases are those resins which harden to useful rigidities for use as structural products.
  • Polyester resins are well known and amply described for example in the 1979-1980 Modern Plastics Encyclopedia.
  • Such resins are the reaction product of a dibasic acid and a glycol, e.g. phthalic anhydride, isophthalic acid and adipic acid with one or more of propylene glycol, ethylene glycol, diethylene glycol and dipropylene glycol.
  • Crosslinking monomers used include styrene, vinyl toluene, methyl methylmethacrylate, methyl styrene, and diallyl phthalate. Inhibitors such as quinone, hydroquinone and butyl catechol may be used.
  • Typical catalysts for the reaction are free radical precursors, e.g. the peroxides which decompose at elevated or ambient temperatures, e.g. methyl ethyl ketone peroxide, cyclohexanone peroxide, and benzoyl peroxide, or cumene hydroperoxide, t-butyl perbenzoate, and peroctoate. Resins of less intrinsic clarity will be useful where the ultimate in translucency is not required. Accordingly such thermosetting (including room temperature cure) resins as allyls, ureas, phenolics, polyimides, epoxy, and polyurethanes, may be used in particular cases.
  • a polyester resin was hardened by the application of moderate temperature, ca. 175 degrees for a period of 60 minutes in a simple rectangular mold to provide a body of hardened resin weighing about 5 pounds.
  • the body was frozen instantly in liquid nitrogen and crushed in an impact mill into pieces approximately 1/4 by 1/4 inches on a side, and these pieces fed centrifugally against a series of teeth in a circular path to reduce the pieces in after sufficient passes to polyhedras chips of nonsymmetrical shape and of a mean average particle size of 80 U.S. mesh screen.
  • the particles were combined with a color pigment in a quantity of liquid uncured resin of the same type.
  • a further portion of this polyester resin was combined with particulate, and without the addition of any colorant.
  • the invention provides a novel product overcoming the disadvantages of previous products and opening new opportunities for the manufacture of highly attractive cultured onyx and marble products, such as the traditional tubs, pullmans, basins, water closets, lavabos, and additionally fountains, sculptures, tiles, wall decorations, faucets and handles, soap dishes and statuary.

Landscapes

  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Mushroom Cultivation (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP84300577A 1984-01-30 1984-01-30 Onyximitationsprodukte und ihr Herstellungsverfahren Expired EP0150547B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT84300577T ATE56399T1 (de) 1984-01-30 1984-01-30 Onyximitationsprodukte und ihr herstellungsverfahren.
DE8484300577T DE3483208D1 (de) 1984-01-30 1984-01-30 Onyximitationsprodukte und ihr herstellungsverfahren.
EP84300577A EP0150547B1 (de) 1984-01-30 1984-01-30 Onyximitationsprodukte und ihr Herstellungsverfahren
HK213/91A HK21391A (en) 1984-01-30 1991-03-21 Cultured onyx products and methods therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84300577A EP0150547B1 (de) 1984-01-30 1984-01-30 Onyximitationsprodukte und ihr Herstellungsverfahren

Publications (2)

Publication Number Publication Date
EP0150547A1 true EP0150547A1 (de) 1985-08-07
EP0150547B1 EP0150547B1 (de) 1990-09-12

Family

ID=8192548

Family Applications (1)

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EP84300577A Expired EP0150547B1 (de) 1984-01-30 1984-01-30 Onyximitationsprodukte und ihr Herstellungsverfahren

Country Status (4)

Country Link
EP (1) EP0150547B1 (de)
AT (1) ATE56399T1 (de)
DE (1) DE3483208D1 (de)
HK (1) HK21391A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367776A1 (de) * 1987-06-08 1990-05-16 Suncor Corp Kunststein.
DE9006708U1 (de) * 1990-06-15 1990-08-30 Groß, Anneliese, 3000 Hannover Dekorations-Hohlkörper
US5055327A (en) * 1987-06-08 1991-10-08 David Baskin Simulated stone
WO1993005967A1 (en) * 1991-09-16 1993-04-01 Surface Technologies Method for producing article simulating marble, granite etc.
GB2275131A (en) * 1993-01-15 1994-08-17 Kim Harding Electrical fittings
WO2000028872A2 (de) * 1998-11-18 2000-05-25 Blanco Gmbh & Co. Kg Armaturenteile mit granitdekoroberfläche

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD891587S1 (en) 2018-07-10 2020-07-28 Jarion Stanley Decorative faucet handle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761176A (en) * 1954-04-06 1956-09-04 Kenro Corp Method and composition for the production of speckled plastic ware
FR1376985A (fr) * 1962-11-22 1964-10-31 Procédé pour réaliser au moyen de résines polymérisables, des surfaces reproduisant des pierres naturelles, telles que marbre, albâtre, et les produits obtenus par ce procédé
FR1403046A (fr) * 1964-05-06 1965-06-18 Panneaux, pièces de forme, plaques synthétiques présentant l'aspect du granit
US3396067A (en) * 1963-07-18 1968-08-06 Mira Chem Inc Resinous product simulating onyx
US3773886A (en) * 1971-11-24 1973-11-20 Fabri Netics Ltd Process for forming simulated marble
US4137215A (en) * 1973-04-26 1979-01-30 Stamicarbon, B.V. Process for preparing decorative plastics articles, as well as products prepared according to the process
US4343752A (en) * 1978-11-30 1982-08-10 Irving Cann Synthetic onyx and method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2761176A (en) * 1954-04-06 1956-09-04 Kenro Corp Method and composition for the production of speckled plastic ware
FR1376985A (fr) * 1962-11-22 1964-10-31 Procédé pour réaliser au moyen de résines polymérisables, des surfaces reproduisant des pierres naturelles, telles que marbre, albâtre, et les produits obtenus par ce procédé
US3396067A (en) * 1963-07-18 1968-08-06 Mira Chem Inc Resinous product simulating onyx
FR1403046A (fr) * 1964-05-06 1965-06-18 Panneaux, pièces de forme, plaques synthétiques présentant l'aspect du granit
US3773886A (en) * 1971-11-24 1973-11-20 Fabri Netics Ltd Process for forming simulated marble
US4137215A (en) * 1973-04-26 1979-01-30 Stamicarbon, B.V. Process for preparing decorative plastics articles, as well as products prepared according to the process
US4343752A (en) * 1978-11-30 1982-08-10 Irving Cann Synthetic onyx and method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0367776A1 (de) * 1987-06-08 1990-05-16 Suncor Corp Kunststein.
EP0367776A4 (en) * 1987-06-08 1990-11-28 Suncor Corporation Simulated stone
US5055327A (en) * 1987-06-08 1991-10-08 David Baskin Simulated stone
DE9006708U1 (de) * 1990-06-15 1990-08-30 Groß, Anneliese, 3000 Hannover Dekorations-Hohlkörper
WO1993005967A1 (en) * 1991-09-16 1993-04-01 Surface Technologies Method for producing article simulating marble, granite etc.
GB2275131A (en) * 1993-01-15 1994-08-17 Kim Harding Electrical fittings
WO2000028872A2 (de) * 1998-11-18 2000-05-25 Blanco Gmbh & Co. Kg Armaturenteile mit granitdekoroberfläche
WO2000028872A3 (de) * 1998-11-18 2000-09-28 Blanco Gmbh & Co Kg Armaturenteile mit granitdekoroberfläche

Also Published As

Publication number Publication date
DE3483208D1 (de) 1990-10-18
ATE56399T1 (de) 1990-09-15
EP0150547B1 (de) 1990-09-12
HK21391A (en) 1991-03-28

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