| Patents for C04B 20 - Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups  and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups  specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials (4,429) | 
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| 03/17/1981 | US4256501 Rock treating method and compositions | 
| 03/10/1981 | US4255489 Coated with polydimethylsiloxane heated to become attrition-resistant | 
| 03/10/1981 | US4255197 Wetting plastic substrate, coating with refractory, sintering and bonding, lightweight | 
| 03/03/1981 | US4254019 Molding material of ground glass and binder wherein the fine partiles are coated with binder and admixed with coarse particles | 
| 02/24/1981 | US4252603 Preparation of asbestos fibers | 
| 02/19/1981 | WO1981000422A1 Process for the preparation of fibers | 
| 02/17/1981 | US4251577 Asphalt-coated glass fibers | 
| 02/05/1981 | WO1981000252A1 Fiber-reinforced composite materials and shaped articles | 
| 02/04/1981 | EP0023374A1 Process for applying insulating layers onto surfaces | 
| 02/03/1981 | US4248752 Vehicle ceramic fiber, colloidal silica, polar polymer adhesion enhancer | 
| 01/27/1981 | CA1094583A1 Hardened product composition and process of producing the same | 
| 01/22/1981 | WO1981000104A1 Manufacturing of porous shaped articles and building constructions erected from these articles | 
| 01/20/1981 | CA1093908A1 Air-entrained-spherical plastics treated with adhesive mixtures containing viscous soils | 
| 01/13/1981 | US4245054 Coating polystyrene particles with aqueous solution of methyl cellulose | 
| 01/07/1981 | EP0021500A2 Process for coating mineral, organic or metallic microscopic or macroscopic substrates, and the substrates so coated | 
| 01/07/1981 | EP0020530A1 Centrifuge apparatus and method for producing hollow microspheres | 
| 12/30/1980 | US4242376 Method for metal plating of powder by substitution | 
| 12/30/1980 | CA1092388A1 Method of incorporating multifilament strands of carbon fibers into cement to produce reinforced structures having improved flexural strengths | 
| 12/09/1980 | US4238430 Method for forming expanded cellular volcanic ash | 
| 12/09/1980 | US4238242 Lightweight aggregates, intermediate aggregates, and process of manufacturing same | 
| 11/26/1980 | EP0019469A2 Chromium oxide coated fibres, articles made therefrom and method of coating the fibres | 
| 11/26/1980 | EP0019207A1 Method of producing gypsum building elements | 
| 11/25/1980 | US4235640 Lightweight concrete aggregate and method | 
| 11/18/1980 | US4234659 Composite material and method of producing same | 
| 11/18/1980 | US4234347 Binder for chemically resistant concrete and process for producing this binder | 
| 11/12/1980 | EP0018410A1 Method and apparatus for producing hollow plastic microspheres | 
| 11/11/1980 | US4233366 Silane coated silicate minerals and method for preparing same | 
| 11/04/1980 | US4231884 Water retardant insulation composition comprising treated low density granular mineral material and finely divided limestone or similar carbonate or silicate mineral particles and method for using same | 
| 10/28/1980 | US4230502 Building material additive | 
| 10/15/1980 | EP0017548A1 Construction material, its application as a filler,a coating or a foundation mass to loose soil; process and apparatus for manufacturing this material | 
| 10/15/1980 | EP0016818A1 Method for compressing gaseous materials in a contained volume | 
| 10/07/1980 | US4226672 Process of separating asbestos fibers and product thereof | 
| 10/07/1980 | US4226635 Scavenger, antideposit agent | 
| 09/17/1980 | EP0015293A1 Method and apparatus for producing hollow microspheres. | 
| 09/09/1980 | CA1085239A1 Process for producing composite powder particles | 
| 08/26/1980 | US4219609 Mineral products | 
| 08/12/1980 | US4216829 Neutral polysaccharide, surfactant mixture | 
| 07/15/1980 | US4212755 Settle resistant loose-fill perlite insulation comprising particles rendered slightly tacky by a coating thereon | 
| 07/09/1980 | EP0012832A1 Process for making blast-furnace slag water-repellent | 
| 07/08/1980 | US4211738 Lightweight aggregate | 
| 06/03/1980 | US4206262 Sand, novolak, curing agent | 
| 05/28/1980 | EP0011472A1 Light-weight silicate aggregate | 
| 05/20/1980 | US4203773 Lightweight silicate aggregate | 
| 05/15/1980 | WO1980000959A1 Shaped article and composite material and method for producing same | 
| 05/14/1980 | EP0010777A1 Shaped article and composite material and method for producing same | 
| 04/17/1980 | WO1980000695A1 Centrifuge apparatus and method for producing hollow microspheres | 
| 04/15/1980 | US4198201 Method of and apparatus for operating industrial furnace systems | 
| 04/08/1980 | CA1075096A1 Granulated fire retardant material | 
| 04/02/1980 | EP0009311A1 Dry powder composition comprising vermiculite lamellae, process for its production and process for making shaped articles therefrom | 
| 04/02/1980 | EP0009310A1 Compositions of vermiculite lamellae and solid particulate materials and process for the production of vermiculite articles | 
| 03/25/1980 | US4195010 Ceramic coated quartz particles | 
| 03/25/1980 | US4194914 Coating, with phosphorous compounds | 
| 03/20/1980 | WO1980000439A1 Method for compressing gaseous materials in a contained volume | 
| 03/20/1980 | WO1980000438A1 Method and apparatus for producing hollow microspheres | 
| 03/20/1980 | WO1980000426A1 Method and apparatus for producing hollow plastic microspheres | 
| 03/18/1980 | US4194023 Controlled deposition of asphalt emulsions | 
| 02/26/1980 | US4190456 Cementitious composition containing asbestos fibres and prepared using a surfactant | 
| 02/20/1980 | EP0008284A1 Process for manufacturing plastic-coated ornamental concrete bricks | 
| 02/12/1980 | US4188454 Organo silane coupling agents overcoated on aluminum silicate coating on glass fibers | 
| 02/05/1980 | CA1071076A1 Silane coated silicate minerals and method for preparing same | 
| 01/15/1980 | US4183980 Perlite filler coated with polydimethylsiloxane | 
| 12/18/1979 | US4179264 Combustion of hydrocarbon gases | 
| 11/20/1979 | US4175159 Waterproofing, curing, ammonium carboxylate emulsifiers | 
| 11/20/1979 | US4175153 Inorganic anisotropic hollow fibers | 
| 11/13/1979 | US4174331 Acrylamide polymer, polyethylene oxide, hydroxyethyl cellulose andor carboxymethyl cellulose as adhesion enhancer, molding | 
| 10/30/1979 | US4172744 Granulated fire-retardant materials and their applications | 
| 10/23/1979 | US4171951 Means for producing cementitious product from quenched fly ash | 
| 10/16/1979 | US4171405 Asbestos treatment with metal molybdates | 
| 09/25/1979 | CA1063133A1 Porous, lightweight, particulate aggregates and process of manufacture | 
| 09/19/1979 | EP0004177A1 A method of metal coating of diamond or cubic boron nitride particles and an abrasive tool containing the particles thus coated | 
| 09/18/1979 | US4168346 Asbestos treatment with metal tungstates | 
| 09/11/1979 | CA1062096A1 Surface treatment of asbestos fibers | 
| 07/31/1979 | US4163073 Process for treating inorganic siliceous surfaces | 
| 07/24/1979 | US4162348 Anionic and cationic surfactants and dyes | 
| 07/24/1979 | US4162166 Porous, lightweight, particulate aggregates and process of manufacture | 
| 07/17/1979 | CA1058459A1 Coating compositions for glass fibres | 
| 06/12/1979 | US4157998 Method of producing a cement mortar with good stability in a fresh condition and a method using this mortar as a binding agent of producing a lightweight aggregate concrete with a high aggregate content | 
| 04/10/1979 | US4148941 Process for dust reduction treatment of expanded perlite | 
| 03/13/1979 | CA1050676A1 Organosiliconates water repellent compositions | 
| 03/06/1979 | US4143202 Ash coated cellular glass pellet | 
| 02/27/1979 | US4141751 Process for preparing modified particulate and/or fibrous, crystalline and amorphous inorganic substances | 
| 01/30/1979 | US4137367 Silane coated silicate minerals and method for preparing same | 
| 10/24/1978 | US4122074 Michael addition reaction, adhesives | 
| 10/17/1978 | US4120738 Light weight aggregate and method for making same | 
| 10/03/1978 | US4118273 Incorporation of fine perlite particles in slurry | 
| 09/19/1978 | CA1038890A1 Siliceous thermal insulation and method of making same | 
| 09/12/1978 | CA1038528A1 Building material element | 
| 09/05/1978 | US4111711 Alkaline earth mineral and silica or chromium dioxide or titania or zirconia or alumina and a filler | 
| 08/22/1978 | US4109051 Polyhydroxy aromatic coating compositions for reinforcing glass fibers used in cementitious products | 
| 08/22/1978 | US4108813 Portland cement, acrylic in water emulsion and a flow control agent | 
| 08/15/1978 | US4107376 Porous core coated or impregnated with inorganic material capable of foaming when heated | 
| 08/08/1978 | US4105458 Blend of two aggregate materials of different wear rates in binder matrix | 
| 06/20/1978 | US4095995 Porous aggregate for light-weight concrete | 
| 05/23/1978 | US4090995 Process for hot resin coating of shell sands using salicylic acid | 
| 03/07/1978 | US4077938 Sol of ultra-fine particles of layered structure material | 
| 02/28/1978 | US4076884 Fibre reinforcing composites | 
| 02/21/1978 | US4075026 Acidification, deacidification | 
| 12/13/1977 | US4062690 Coating compositions for glass fibres | 
| 10/11/1977 | US4053322 Heat treatment | 
| 09/13/1977 | US4047967 Concrete composition |