Coating Patents (Class 71/64.07)
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Patent number: 6500223Abstract: A coated granular fertilizer which comprises a degradable film containing 10% by weight or more of a polyolefin and/or petroleum wax having a weight-average molecular weight of 300-10,000 and an inorganic filler and/or a surface active agent and a granular fertilizer coated with said degradable film.Type: GrantFiled: August 13, 1999Date of Patent: December 31, 2002Assignee: Asahi Kasei Kabushiki KaishaInventors: Yuichi Sakai, Keishi Tada, Hiroyuki Kobayashi
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Publication number: 20020184933Abstract: Applying a polyhydric alcohol anti-dust agent, such as glycerol, to inorganic particulate materials reduces the formation of dust during processing and handling. The anti-dust agent is particularly effective for reducing dust formation in fertilizers such as disintegrating sulfur fertilizer (DSF), without interfering with the useful disintegration or other useful properties of the fertilizer.Type: ApplicationFiled: April 30, 2001Publication date: December 12, 2002Applicant: Montana Sulphur & Chemical CompanyInventors: Fred S. Bell, Donald G. Zink
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Patent number: 6491736Abstract: Applying a polyhydric alcohol anti-dust agent, such as glycerol, to inorganic particulate materials reduces the formation of dust during processing and handling. The anti-dust agent is particularly effective for reducing dust formation in fertilizers such as disintegrating sulfur fertilizer (DSF), without interfering with the useful disintegration or other useful properties of the fertilizer.Type: GrantFiled: April 30, 2001Date of Patent: December 10, 2002Assignee: Montana Sulphur & Chemical CompanyInventors: Fred S. Bell, Donald G. Zink
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Patent number: 6475259Abstract: A coated fertilizer is provided along with a method for producing the coated fertilizer, where the coated fertilizer has a coating made of at least one amine compound which is a primary, secondary or tertiary, straight or branched hydrocarbon chain amine or an amine containing a cyclic hydrocarbon radical and; a microcrystalline wax, a paraffin wax or a soft synthetic wax.Type: GrantFiled: October 29, 1999Date of Patent: November 5, 2002Assignee: Mississippi Chemical CorporationInventors: Donald Ray Thomas, Corinne Grady Ciaccio, Kerry Collins
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Patent number: 6413292Abstract: A polyester dispersion comprising water and a biodegradable copolyester which contains structural units derived from both aliphatic and aromatic carboxylic acids or their derivatives, and the coated fertilizer granules prepared using this polyester dispersion, and a process for their preparation. A fertilization method in which the coated fertilizer granules according to the invention are used.Type: GrantFiled: March 25, 1999Date of Patent: July 2, 2002Assignee: BASF AktiengesellschaftInventors: Klaus Horchler v. Locquengh, Motonori Yamamoto, Klaus Erhardt, Son Nguyen Kim, Volker Warzelhan
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Patent number: 6391454Abstract: Controlled release urea-based feed supplements for ruminant animals and controlled release urea-based plant nutrients are comprised of particles or granules comprised in whole or in principal part of urea or having urea at or on the exterior surfaces thereof, and a moisture resistant interpenetrating polymer network coating on the particles comprised of the reaction products of urea and a polyisocyanate, and the reaction products of polyisocyanate, an alkyd resin having at least one double bond in each repeat unit and an oil having at least one double bond, the double bonds being reactive with one another and with themselves. The coated plant nutrients have a substantially linear rate of release of nutrients to the soil over a controlled period of time, e.g., 30 to 120 days. The coated ruminant feed supplements have a substantially linear rate of NPN release in the rumen over a controlled period of time, e.g., 12 to 24 hours.Type: GrantFiled: March 16, 2000Date of Patent: May 21, 2002Assignee: Agway Inc.Inventors: Lijun Mao, Xiaoming Yang, Robert J. Petcavich
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Patent number: 6364925Abstract: The present invention relates to polyurethane encapsulated fertilizer particles which exhibit slow-release properties and to a process for their production. The process comprises applying an isocyanate-reactive component to fertilizer particles, to form fertilizer particles coated with an isocyanate-reactive component, applying a polyisocyanate component onto the coated fertilizer particles to form polyurethane encapsulated fertilizer particles, and, optionally, repeating these steps as many times as necessary to form the polyurethane encapsulated fertilizer particles that contain about 2 to 20% by weight of polyurethane, based on the total weight of the encapsulated fertilizer particles. Suitable isocyanate-reactive components include polyesterether polyols that comprise either a blend of or the reaction product of (i) castor oil having an OH number of about 160 to about 170, a viscosity of about 500 to about 900 mPa.s at 25° C., and a water content of less than 0.Type: GrantFiled: December 10, 1999Date of Patent: April 2, 2002Assignee: Bayer CorporationInventors: Peter H. Markusch, Robert L. Cline, Ashok M. Sarpeshkar, Robert P. Yeater
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Patent number: 6358296Abstract: This invention relates to polyurethane encapsulated fertilizer particles which exhibit slow-release properties and to a process for their production. The process comprises (1) applying an isocyanate-reactive component or a polyisocyanate component to fertilizer particles, to form coated fertilizer particles, followed by (2) applying a polyisocyanate component or an isocyanate-reactive component onto the coated fertilizer particles to form polyurethane encapsulated fertilizer particles, and, optionally, repeating these steps as many times as necessary to form the polyurethane encapsulated fertilizer particles that contain about 2 to 20% by weight of polyurethane, based on the total weight of the encapsulated fertilizer particles. Alternatively, the isocyanate-reactive component and the polyisocyanate component can be premixed prior to being applied to the fertilizer particles to form polyurethane encapsulated fertilizer particles. Suitable isocyanate-reactive components comprise oleo polyols.Type: GrantFiled: July 11, 2000Date of Patent: March 19, 2002Assignee: Bayer CorporationInventors: Peter H. Markusch, Robert L. Cline, Ashok M. Sarpeshkar
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Patent number: 6358295Abstract: The present invention provides a method for producing a controlled-release coated fertilizer which provides few floats when applied in water, gives uniform coat and makes it possible to release fertilizer ingredient constantly in a short time at ordinary temperature to low temperature. The method comprises adding water-absorptive polymer to granular fertilizer and then coating it with at least one urethane resin layer.Type: GrantFiled: March 6, 2001Date of Patent: March 19, 2002Assignee: Sumitomo Chemical Company, LimitedInventors: Nobuaki Tabei, Noriaki Saitou, Kazuhisa Endo
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Patent number: 6355083Abstract: A dust control composition for and method of treating fertilizer particles, the composition comprising 10-100% by weight oxidized oil, 0-90% by weight non-oxidized oil, and 0-90% by weight wax. The fertilizer particle is selected from the group consisting of ammonium phosphate, potash, granulated single super phosphate, granular triple super phosphate, NP-fertilizer and NPK-fertilizer. A preferred composition includes a composition of 30-90% by weight oxidized oil, 10-70% by weight non-oxidized oil, and 10-70% by weight wax. The oxidized oil is selected from the group consisting of corn oil, canola oil, cottonseed oil, sunflower oil, soy oil, linseed oil, castor oil, tall oil, mixtures thereof, and distillation products and distillation residues thereof.Type: GrantFiled: January 24, 2000Date of Patent: March 12, 2002Assignee: ARR-MAZ Products, LPInventor: Mark B. Ogzewalla
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Patent number: 6338746Abstract: The present invention described a polymer coated fertilizer, such as urea, subsequently coated with a layer of sulfur and thereafter a further coating of polymer. Preferably, the polymer coatings are formed by the direct in situ co-polymerization of the components of the polymer on the fertilizer and on the sulfur coating. The compositions provide positive controlled release characteristics, are abrasion and impact resistant and are substantially more economical to produce than polymer coated fertilizers.Type: GrantFiled: July 23, 1999Date of Patent: January 15, 2002Assignee: RLC Technologies, L.L.C.Inventors: John H. Detrick, Garrard L. Hargrove
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Patent number: 6336949Abstract: A novel composition for a slow release nitrogenous fertilizer comprising about 0.5-1% of an inert material, 0.5-1% of essential oil or their derivatives on w/w basis and process for the preparation of the composition.Type: GrantFiled: March 5, 1999Date of Patent: January 8, 2002Assignee: Council of Scientific & Industrial ResearchInventors: Dharani Dhar Patra, Usha Kiran, Aparbal Singh, Krishna Kumar Agarwal, Suman Preet Singh Khanuja, Mohammad Anwar, Sushil Kumar
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Patent number: 6322606Abstract: The invention relates to a coated granular fertilizer having a film covering fertilizer granules. This film comprises a polyurethane resin prepared by a method comprising the steps of (a) reacting an aromatic polyisocyanate with a first polyol component (i.e., castor oil or a castor oil derivative), thereby to obtain a prepolymer having terminal isocyanate groups in the molecule; and (b) reacting the prepolymer with a second polyol component (i.e., castor oil or a castor oil derivative) and a third polyol component which is an amine having at least two hydroxyl groups in the molecule, thereby to cure the prepolymer and thus to prepare the polyurethane resin. The invention relates to another coated granular fertilizer having a film covering fertilizer granules. This film comprises a urethane resin and aqueous-fluid-absorbing particles having a particle diameter of from 1 to 200 &mgr;m. This urethane resin may be the above polyurethane resin.Type: GrantFiled: September 20, 2000Date of Patent: November 27, 2001Assignee: Central Glass Company, LimitedInventors: Haruhiko Komoriya, Kazuhiko Maeda, Masayuki Shiota, Yoshi Hirashima, Kentaro Tsutsumi, Mikio Ootani, Yukio Ikeda
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Patent number: 6315807Abstract: The invention relates to a novel formulation useful as a nitrification and urease inhibitor, said formulation comprising an effective amount of nitrogenous fertilizer, castor oil and oil derived from Artemisia annua, in an amount sufficient to enhance the nitrification activity of the formulation, a method for producing the formulation and method for applying the same to soil.Type: GrantFiled: March 28, 2000Date of Patent: November 13, 2001Assignee: Council of Scientific and Industrial ResearchInventors: Dharani Dhar Patra, Usha Kiran, Mohammed Anwar, Sukhmal Chand, Sushil Kumar
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Patent number: 6309439Abstract: The coated fertilizer granules are coated with a carboxyl-carrying ethylene copolymer in which the carboxyl groups may also be in the form of their salts, the carboxyl-carrying ethylene copolymer being composed of a) from 75 to 90% by weight of ethylene and b) from 10 to 25% by weight of an &agr;-olefinically unsaturated C3-C8-alkanecarboxylic acid, and those coated fertilizer granules which contain an active ingredient for crop protection being excepted.Type: GrantFiled: September 15, 2000Date of Patent: October 30, 2001Assignee: K + S AktiengesellschaftInventors: Klaus Horchler von Locquenghien, Karl Engelhardt, Eberhard Kleinbach, Michael Wolfgang Müller
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Patent number: 6287359Abstract: Granule mixtures composed of a) 5 to 45% by weight of coated fertilizer granules (granules a), composed of a1) a core, comprising a customary fertilizer, and a2) a coat, comprising a coat polymer, and b) 55 to 95% by weight of non-coated fertilizer granules, comprising a customary fertilizer (granules b).Type: GrantFiled: July 29, 1998Date of Patent: September 11, 2001Assignee: K+S AktiengesellschaftInventors: Klaus Erhardt, Klaus Horchler von Locquenghien, Reinhardt Hähndel, Jürgen Dressel, Hans Lang
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Patent number: 6271174Abstract: Improved cation exchange zeolite crystalline and zeolite-like plant bed structures are disclosed, preferably saturated with water-based extracts of particular plant/herb materials exhibiting plant growth acceleration properties and synergistically providing also nutrient, and sometimes anti-microbial and insect and fungus repellent properties, as well, and with the adaptability to present the structures in solid, gel and liquid form.Type: GrantFiled: July 28, 1997Date of Patent: August 7, 2001Assignee: Allor FoundationInventors: Robert H. Rines, Lisa Toth, Suzi Rines Toth
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Patent number: 6264985Abstract: A dry-coated tablet for controlled release of active substance, having an erodible core tablet (1) containing at least one active substance, and a substantially erosion-resistant shell consisting of a dry-coated layer (5), is characterized in that the dry-coated layer (5) has at least one opening (6), and one end of the core tablet (1) extends as far as the opening (6).Type: GrantFiled: March 6, 1997Date of Patent: July 24, 2001Assignee: LTS Lohmann Therapie-Systeme GmbHInventor: Karsten Cremer
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Patent number: 6261996Abstract: A pregerminated rice seed comprising a plant growth regulator, optionally further comprising a phytoprotection product, especially an insecticide.Type: GrantFiled: October 19, 1999Date of Patent: July 17, 2001Assignee: Rhone-Poulenc Inc.Inventors: Carla Rasmussen Klittich, Michael Glenn Redlich
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Patent number: 6231633Abstract: Provided is a granular fertilizer coated with a thermosetting resin coating, characterized in that a dissolution rate of the fertilizer is retarded by containing a hydrophobic compound in at least one of the coating portion and the fertilizer portion thereof. The dissolution rate is further retarded than that of a conventional granular coated fertilizer coated with a thermosetting resin.Type: GrantFiled: May 19, 1999Date of Patent: May 15, 2001Assignee: Sumitomo Chemical Company LimitedInventors: Yasuhiro Hirano, Yutaka Yamaguchi, Hiroshi Nakamura
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Patent number: 6230438Abstract: This invention provides for seed coatings which comprise water insoluble polymers which absorb water, resist passage of water and are freeze labile. The seed coatings are useful for fall planting in cold climates.Type: GrantFiled: September 20, 1999Date of Patent: May 15, 2001Assignee: Grow Tec Inc.Inventors: Kevin S. Zaychuk, Nicholas Enders
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Patent number: 6193775Abstract: A coated granular fertilizer which makes it possible to independently design the period since its application till 10% dissolution-out and the period since 10% dissolution-out till completion of its dissolution-out is provided, which fertilizer is prepared by coating a granular fertilizer with a coating having a sugar polymer or its derivative dispersed therein, and has a time limit dissolution-out function, the former period till 10% dissolution-out and the latter dissolution-out duration being respectively capable of being controlled to within a range of 26 to 315 days and a range of 29 to 371 days.Type: GrantFiled: August 6, 1993Date of Patent: February 27, 2001Assignee: Chisso CorporationInventors: Toshio Fujita, Shigemitsu Yoshida
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Patent number: 6187074Abstract: The coated fertilizer granules are coated with a carboxyl-carrying ethylene copolymer in which the carboxyl groups may also be in the form of their salts, the carboxyl-carrying ethylene copolymer being composed of a) from 75 to 90% by weight of ethylene and b) from 10 to 25% by weight of an &agr;-olefinically unsaturated C3-C8-alkanecarboxylic acid, and those coated fertilizer granules which contain an active ingredient for crop protection being excepted.Type: GrantFiled: December 15, 1997Date of Patent: February 13, 2001Assignee: K + S AktiengesellschaftInventors: Klaus Horchler von Locquenghien, Karl Engelhardt, Eberhard Kleinbach, Michael Wolfgang Müller
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Patent number: 6176891Abstract: The invention relates to a coated granular fertilizer having a film covering fertilizer granules. This film comprises a polyurethane resin prepared by a method comprising the steps of (a) reacting an aromatic polyisocyanate with a first polyol component (i.e., castor oil or a castor oil derivative), thereby to obtain a prepolymer having terminal isocyanate groups in the molecule; and (b) reacting the prepolymer with a second polyol component (i.e., castor oil or a castor oil derivative) and a third polyol component which is an amine having at least two hydroxyl groups in the molecule, thereby to cure the prepolymer and thus to prepare the polyurethane resin. The invention relates to another coated granular fertilizer having a film covering fertilizer granules. This film comprises a urethane resin and aqueous-fluid-absorbing particles having a particle diameter of from 1 to 200 &mgr;m. This urethane resin may be the above polyurethane resin.Type: GrantFiled: March 26, 1998Date of Patent: January 23, 2001Assignee: Central Glass Company, LimitedInventors: Haruhiko Komoriya, Kazuhiko Maeda, Masayuki Shiota, Yoshi Hirashima, Kentaro Tsutsumi, Mikio Ootani, Yukio Ikeda