Patent Briefing

PATENT BRIEFING

EUROPE

• European Patent Application 102,324 (1984) Unilamellar liposomes preparation from lipids and surfactants in an aqueous phase CIBA-GEIGY A.-G. H. Hauser. Liposomes which can be used for pharmaceutical delivery were prepared.
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FRANCE

• French Demande 2,530,190 (1984) Paper for pressure-sensitive copying of the type 'transfer on ordinary paper' MITSUBISHI PAPER MILLS LTD. T. Matsushita, S. Hiraishi and S. Morishita. Pressure-sensitive copying paper which gave a distinct black image was prepared from a microencapsulated electron donor colour former and an electron acceptor colour developer.
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F.R. GERMANY

• German Offenlegungsschrift 3,224,454 (1984) Microcapsules with water-insoluble substances as core material and capsule walls made from reaction products of water-insoluble polyamines with water-soluble polyisocyanates, and their use in copying papers BAYER A.-G. M. Dahm, N. Weimann, U. Nehen, H. P. Mueller and G. Jabs. The title microcapsules were prepared which are especially useful in the production of pressure sensitive copying papers, toners for copying systems or as absorbing systems.
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• German Offenlegungsschrift 3,335,701 (1984) Large multilamellar lipid vesicles containing phospholipids as drug carriers LIPODERM PHARMACEUTICALS LTD. M. Mezei and F. J. Nugent. Lipid vesicles were formed on glass pearls of diameter 5 mm and progesterone was microencapsulated in the vesicles.
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GERMAN DEMOCRATIC REPUBLIC

• German D.R. Patentschrift 207,862 (1984) Nuclear fuel microspheres AKADEMIE DER WISSENSCHAFTEN DER D.D.R. H. J. Engelmann. Uranium dioxide microspheres, prepared from uranyl nitrate, are vibration compacted to form fuel elements for nuclear reactors.
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JAPAN

• Japan Kokai Tokkyo Koho 58 33,240 (1983) Thermal development type diazo copying paper RICOH CO. LTD. Thermal development copying paper was prepared using a microencapsulated coupler.
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• Japan Kokai Tokkyo Koho 58 33,491 (1983) Diazo pressure sensitive copying paper RICOH CO. LTD. Recording materials with a good shelf-life and image reproduction were prepared using a microencapsulated diazo compound.
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• Japan Kokai Tokkyo Koho 58 33,492 (1983) Microcapsules for making pressure-sensitive copying paper KUREHA CHEMICAL INDUSTRY CO. LTD. MiCrOCapSUieS having improved solvent resistance were prepared for pressure sensitive recording paper.
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• Japan Kokai Tokkyo Koho 58 38,190 (1983) Microcapsule sheets for pressure-sensitive copying systems KANZAKI PAPER MFG. CO. LTD. A pressure-sensitive sheet having excellent blemish resistance was prepared containing polyurethane particles to improve pressure and abrasion resistance of the microcapsule layer.
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• Japan Kokai Tokkyo Koho 58 45,090 (1983) Self-coloring-type recording sheet MITSUBISHI PAPER MILLS LTD. A self-colouring-type recording sheet producing multicolour images by light and pressure was prepared using microencapsulated photohardenable resin and colour-inducing reactants.
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• Japan Kokai Tokkyo Koho 58 56,889 (1983) Pressure-sensitive clay copying papers KANZAKI PAPER MFG. CO. LTD. In the preparation of a pressure-sensitive clay copying paper, a microencapsulated oily substance was used.
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• Japan Kokai Tokkyo Koho 58 59,890 (1983) Pressure-sensitive copying paper MITSUI TOATSU CHEMICALS INC. Pressure sensitive copying paper with good storage life was prepared with a layer of microencapsulated electron donor dyes and a layer of colour-inducing agent.
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• Japan Kokai Tokkyo Koho 58 59,897 (1983) Heat-sensitive transcribing material RICOH CO. I.TD. Transcribing material showing a clear image upon contacting with a thermal head at 200°C under 1 kg/cm2 for 10 mins was prepared using ink contained in heat-rupturable microcapsules.
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• Japan Kokai Tokkyo Koho 58 88,763 (1983) High frequency heat-fixable electric or magnetic latent image developers c CANON K. K. A microwave heat-fixable microencapsulated toner was prepared with diethyl phthalate as the encapsulating material.
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• Japan Kokai Tokkyo Koho 58 90,650 (1983) Electrophotographic high frequency heat-fixable toner BANDO CHEMICAL INDUSTRIES LTD. The title toner with improved fixation time was prepared by forming microcapsules with score material of high-frequency energy-absorbing polar liquid and a heat-softenable polymer shell wall.
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• Japan Kokai Tokkyo Koho 58 162,672 (1983) Solid ink eraser M. NAGATOMO. A solid eraser which can be used on ball-point pen markings was prepared using microencapsulated components.
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• Japan Kokai Tokkyo Koho 59 05,007 (1984) Insect-resistant plywood manufacture SUMITOMO CHEMICAL CO. LTD. Plywood joined with adhesive containing a microencapsulated insecticide is resistant to insects.
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• Japan Kokai Tokkyo Koho 59 16,802 (1984) Pesticide microcapsule suspension TOA GOSEI CHEMICAL INDUSTRY CO. LTD. A suspension of a microencapsulated pesticide was found to be stable even after storage at 40°C for 2 months. On drying, the walls of the microcapsules ruptured.
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• Japan Kokai Tokkyo Koho 59 19,193 (1984) Thermosensitive recording paper MITSUBISHI PAPER MILLS LTD. A thermosensitive recording paper giving a clear black image was prepared using microcapsules containing a leuco dye, a developer and a wax which melts on heating.
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• Japan Kokai Tokkyo Koho 59 20,209 (1984) Microencapsulated copper compounds as fungicides HOKKO CHEMICAL INDUSTRY CO. LTD. A microencapsulated copper-based fungicide was prepared which had controlled release and no phytotoxic effects.
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• Japan Kokai Tokkyo Koho 59 46,125 (1984) Microcapsules JAPAN OXYGEN CO. LTD. Powdered core materials which liquefy or form lumps at ordinary temperatures can be microencapsulated to give good fluidity.
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• Japan Kokai Tokkyo Koho 59 46,215 (1984) Sustained release microcapsules for neoplasm inhibitors TEIJIN LTD. Sustained release microcapsules containing bleomycin, 5-fluorouracil or doxorubicin were prepared.
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• Japan Kokai Tokkyo Koho 59 64,682 (1984) Adhesives for carpets SUMITOMO NAUGATUCK CO. LTD. Latex adhesives containing hollow glass beads are useful for heat- and fire-resistant bonding of carpet backings.
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• Japan Kokai Tokkyo Koho 59 69,139 (1984) Manufacturing microcapsules TEIJIN LTD. A method especially useful for making microcapsules of acids, bases and surfactants is described.
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• Japan Kokai Tokkyo Koho 59 76,021 (1984) Liposomes containing FK 565 FUJISAWA PHARMACEUTICAL CO. LTD. FK 565 encapsulated in liposomes showed greater anti-tumour activity than FK 565 alone.
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PCT

• PCT International Application 84 01,717 (1984) Gelatin based synthetic whole blood NEOMED INC. C. S. Ecanow and B. Ecanow. Synthetic whole bloods were prepared, one of which contained microencapsulated Hb.
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USA

• US Patent 4,446,032 (1984) Liquid or solid fabric softener composition comprising microencapsulated fragrance suspen-sion and process for preparing same INTERNATIONAL FLAVORS AND FRAGRANCES INC. M. A. Munteanu, C. Cseko, E. S. Oltarzewski, J. I. Lindauer and D. A. Withycombe. A fabric softener containing a microencapsulated fragrance oil was used to treat a fabric which releases the fragrance at a uniform rate over an extended period of time.
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• US Patent 4,447,411 (1984) Controlling undesired growth of mollusks UNIVERSITY OF DELAWARE. C. J. Langdon. Mollusks were controlled by releasing a microencapsulated muscle relaxant and a microencapsulated molluscicide into their feeding water.
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• US Patent 4,452,773 (1984) Magnetic iron-dextran microspheres CANADIAN PATENTS AND DEVELOPMENT LTD. R. S. Molday. Colloidal sized particles with a ferromagnetic iron oxide core and polysaccharide coating are stable, have a magnetic moment and can be used as visual markers in scanning and transmission electron microscopy.
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• US Patent 4,452,780 (1984) Coacervated iodine NEOMED CORP. C. S. Ecanow. The preparation of coacervated iodine is described.
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USSR

• USSR Patent 1,090,432 (1984) Phenolic microapherea ALL-UNION SCIENTIFIC-RESEARCH INSTITUTE OF SYNTHETIC RESINS. V. G. Zhigalov, L. M. Aleshina, T. E. Strueva, L. A. Reusova, V. A. Orlov, E. B. Telegina, E. P. Shirokov and B. N. Rotenburg. The preparation of phenolic microspheres is described.
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