Natural Or Synthetic Resin Patents (Class 424/419)
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Patent number: 5089259Abstract: Stable, aqueous emulsion formulations of water-insoluble organic pesticides are formed from a mixture of (1) a water-insoluble organic pesticide, (2) a water based structured particle latex containing nonionic particles to which is bound a layer containing stabilizing pH independent ionic groups chemically bound at or near the surface of the polymer particles, and optionally a cosolvent and/or cosurfactant for the pesticide. The resulting product is much more stable to coalescence than emulsions made with conventional surfactants.Type: GrantFiled: August 30, 1989Date of Patent: February 18, 1992Assignee: DowElancoInventors: Ritchie A. Wessling, Dale M. Pickelman, Dennis G. Wujek
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Patent number: 5079005Abstract: Disclosed is a porous protein particle for delivering over a period of time an active ingredient impregnated therein, and methods of making and using the same. The protein particles have a median size less than about 50 microns. Active ingredient entrapped in the porous structure is gradually released from the protein particle.Type: GrantFiled: June 5, 1989Date of Patent: January 7, 1992Inventor: Kashmiri L. Gupta
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Patent number: 5049182Abstract: Microcapsule formulations are combined with emulsions or particle dispersions in a single-package formulation which is storage-stable and provides substantially the full efficacy of each of the two forms as if applied individually. The single-package formulation is suspension having two dispersed phases--the first being an active species encapsulated in a shell of inert polymeric diffusion-limiting material (i.e., a microcapsule), and the second being an active species in water-insoluble form with no diffusion-limiting barrier at its surface. An appropriate suspension system is included to prevent the dispersed phases from agglomerating within themselves and with each other. The invention is useful in combining two different active ingredients as well as in combining immediate-delivery and delayed-delivery forms of the same active ingredient.Type: GrantFiled: February 3, 1989Date of Patent: September 17, 1991Assignee: ICI Americas Inc.Inventors: Herbert B. Scher, Marius Rodson, Jose L. Calvo, Miguel Gimeno
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Patent number: 5023247Abstract: A coating composition comprising a first phase containing a cross-linkable resin; a second phase containing water; and a third phase containing an insecticide dissolved in a solvent wherein the solvent is immiscible with the first phase and with water.These coating compositions kill insects even after exposure to weather for extended periods of time. They have kill rates higher than prior art compositions containing the same amount of the same insecticide.Type: GrantFiled: May 30, 1989Date of Patent: June 11, 1991Assignee: Insecta Paint, Inc.Inventors: Jean-Paul Boulanger, Jacques Lupuyo, Francois Klug
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Patent number: 4992268Abstract: A method and apparatus for monitoring and controlling the papaya fruit fly are described. The novel system is a combination of the male papaya fruit fly sex pheromone, 2-methyl-6-vinyl-pyrazine, and a fruit mimic.Type: GrantFiled: September 6, 1988Date of Patent: February 12, 1991Assignee: The United States of America as represented by the Secretary of AgricultureInventors: Peter J. Landolt, Robert R. Heath, Herndon R. Agee
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Patent number: 4952402Abstract: A controlled release powder containing discrete micro-particles for use in edible, pharmaceutical and other controlled release compositions is disclosed. The micro-particles have an average size in the range of from 0.1 to 125 .mu.m. Each of the micro-particles is in the form of a micromatrix of an active ingredient uniformly distributed in at least one non-toxic polymer. The micro-particles have a predetermined release of active ingedient when the dissolution rate thereof is measured according to the Paddle Method of U.S. Pharmacopoeia XX at 37.degree. C. and 75 r.p.m.Type: GrantFiled: March 17, 1988Date of Patent: August 28, 1990Assignee: Elan Corporation, p.l.c.Inventors: Randall T. Sparks, Edward J. Geoghegan
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Patent number: 4948586Abstract: A microencapsulated insecticidal pathogen for application to vegetation is disclosed. An insecticidal viral, bacterial or fungal pathogen is encapsulated in a polymeric encapsulating agent such as Eudragit L, Eudragit S, Eudragit L or S with Eudragit RL, Eudragit L or S with Eudragit RS, polyacrylates, polyacrylic acids, cyclic acrylate polymer or mixtures thereof. Also encapsulated in the polymeric encapsulating agent is a sunscreening agent such as benzophenone, para amino benzoic acid, benzil, or mixtures thereof. Also disclosed is a process for encapsulating an insecticidal pathogen. The microcapsules of the invention effectively retain sunscreening agent within the capsule and are easily prepared without using toxic materials requiring subsequent removal.Type: GrantFiled: August 18, 1988Date of Patent: August 14, 1990Assignee: Lim Technology Laboratories, Inc.Inventors: Howard A. Bohm, Deborah R. Friend
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Patent number: 4921757Abstract: A system for controlled release both in vivo and in vitro of entrapped substances, either at a constant rate over a period of time or in discrete pulses, is disclosed. Biologically active substances, such as drugs, hormones, enzymes, genetic material, antigens including viruses, vaccines, or inorganic material such as dyes and nutrients, are entrapped in liposomes which are protected from the biological environment by encapsulation within semi-permeable microcapsules or a permeable polymeric matrix. Release of the entrapped substance into the surrounding environment is governed by the permeability of both the liposome and surrounding matrix to the substance.Type: GrantFiled: September 3, 1987Date of Patent: May 1, 1990Assignee: Massachusetts Institute of TechnologyInventors: Margaret A. Wheatley, Robert S. Langer, Herman N. Eisen
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Patent number: 4921703Abstract: A vermin exterminating element comprising a culture carrier having culture medium components containing vermin infectious microorganisms and/or the spores of the vermin infectious microorganisms cultivated therein, and a vermin exterminating method using the same.Type: GrantFiled: September 21, 1987Date of Patent: May 1, 1990Assignee: Nitto Electric Industrial Co., Ltd.Inventors: Toshio Higuchi, Ken Hibino, Rikako Yoshii, Takayuki Hiyori, Yoshinori Miyamoto, Eiichiro Fukusaki, Takeo Matsumura, Yoshiko Hashimoto, Michiko Kikuma, Yuko Sahashi, Takeshi Okada
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Patent number: 4908209Abstract: A biocidal phosphate ester in combination with an inert inorganic or organic particulate or polymeric carrier. The biocidal-carrier composition is useful in extending the effective lifetime of the biocidal phosphate ester when incorporated into a variety of materials including plastics, fibrous materials, and solutions. Applications of the disclosed carrier compounds include preparation of mildew resistant paints and plastics having extended antimicrobial properties despite extensive washing and wear of the surface.Type: GrantFiled: May 5, 1988Date of Patent: March 13, 1990Assignee: Interface, Inc.Inventors: Robert H. McIntosh, Jr., Albin F. Turbak, Robert H. McIntosh, Sr.
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Patent number: 4906488Abstract: Forming a solution (preferably a true or complete solution) of mer in any permeant, reacting mer in presence of permeant substantially without rearrangement of the liquid system into separate phases and substantially without encapsulation (defined as any form of entrapment by polymeric solidification, including microencapsulation) and recovering a liquid product useful in formulating slow-release products.Type: GrantFiled: July 1, 1987Date of Patent: March 6, 1990Assignee: Arcade, Inc.Inventor: Ivo E. Pera
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Patent number: 4900551Abstract: Termites are prevented by applying thereto microencapsulated organophosphorus termite controlling composition in an amount of 5-100 g as an effective ingredient. The composition comprises an organophosphorus insecticidal compound encapsulated in a microcapsule formed of a polyurea or polyurethane wall and having an average particle diameter of not more than 80 .mu.m, a wall thickness of 0.1-1 .mu.m, and a value of the average particle diameter/wall thickness of 20-400.Type: GrantFiled: March 10, 1988Date of Patent: February 13, 1990Assignee: Sumitomo Chemical Company, Ltd.Inventors: Toshiro Ohtsubo, Shigenori Tsuda, Yukio Manabe, Takaaki Itoh, Hitoshi Kawada, Goro Shinjo, Kozo Tsuji
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Patent number: 4851227Abstract: The invention provides an insecticidal composition comprising Diazinon ensulated in microcapsules, the microcapsules having an encapsulating wall formed essentially from the reaction product of toluene diisocyanate and a polyfunctional amine, and further provides a process for encapsulating Diazinon in a microcapsular formulation comprising providing an aqueous phase containing a non-basic emulsifier, providing an organic phase containing toluene diisocyanate and Diazinon, combining the aqueous and organic phase to form an oil in water emulsion, and adding an aqueous solution of a polyfunctional amine with agitation to the emulsion, whereby the amine reacts with the toluene diisocyanate to form microcapsular envelopes about the Diazinon material.Type: GrantFiled: July 29, 1987Date of Patent: July 25, 1989Assignee: Ben-Gurion University of the Negev Research & Development AuthorityInventors: Arie Markus, Zvi Pelah
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Patent number: 4828836Abstract: A solid, controlled release, pharmaceutical composition comprising an active ingredient incorporated in a controlled release matrix comprising a water soluble polydextrose.The controlled release matrix may also contain at least one of a digestibele C.sub.8 --C.sub.50 substituted or unsubstituted hydrocarbon, especially a C.sub.12 --C.sub.36 fatty alcohol, and a polyalkylene glycol, especially polyethylene glycol. Optionally, the matrix may contain a cellulose ether, especially a hydroxyalkylcellulose or a carboxyalkylcellulose.Type: GrantFiled: May 19, 1987Date of Patent: May 9, 1989Assignee: Euroceltique S.A.Inventors: Gordon A. Elger, Stewart T. Leslie, Sandra T. A. Malkowska, Ronald B. Miller, Philip J. Neale
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Patent number: 4812486Abstract: An absorbent composition having excellent stability comprising an absorbent resin and 0.01 to 30 percent by weight, based on the dried weight of said absorbent resin, of a radical chain terminator.Type: GrantFiled: August 18, 1987Date of Patent: March 14, 1989Assignee: Kao CorporationInventors: Yasunori Hosokawa, Takatoshi Kobayashi
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Patent number: 4808408Abstract: There is disclosed an improved complex coacervation process for microencapsulation of core ingredients that are partially soluble in the microcapsule walls wherein the core ingredient is first mixed with a coacervation adjacent prior to forming a first colloidal emulsion of core ingredient, and, after combining the first emulsion with a second colloidal solution and cooling to cause gelation, a water-soluble wax derivative is added. No pH adjustment or dilution is necessary, and very high yields of non-agglomerated microcapsules are obtained, both in terms of quantity of microcapsules and content of core ingredient. When deet is the core ingredient there is obtained a long-lasting mosquito repellent.Type: GrantFiled: August 26, 1985Date of Patent: February 28, 1989Assignee: Bend Research, Inc.Inventors: Richard W. Baker, Yasuo Ninomiya
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Patent number: 4775534Abstract: A miticidal composition for controlling spider mite populations is formed by impregnating a controlled release substrate with farnesol and nerolidol to form a flowable liquid concentrate or wettable powder. The flowable liquid concentrate or wettable powder is added to a liquid spray base to which a miticide has been added, and mixed therewith to form the miticidal composition. The resulting composition is applied by conventional tank spray equipment to the foliage of plants or trees to control spider mite populations therein.Type: GrantFiled: February 5, 1986Date of Patent: October 4, 1988Assignee: Fermone Chemicals, Inc.Inventors: Ronald H. Bartlett, Iain Weatherston, F. Gayle Kennedy
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Patent number: 4762718Abstract: A method and phase changing composition with an in situ insecticide for the killing of insects on animals over an extended period of time. The phase changing composition with an in situ insecticide comprises a film-former such as hydroxypropyl cellulose, ethyl cellulose and methyl cellulose, an insecticide and a rapidly evaporating solvent such as volatile alcohol. When the phase changing insecticide composition is applied to an animal, it leaves a liquid bead on the animal which penetrates and encapsulates a portion of the animal's body hairs. As the liquid solvent in the liquid bead evaporates, it forms a dry-to-the-touch gel bead that contains the in situ insecticide which is released from the gel bead over an extended period of time.Type: GrantFiled: April 20, 1987Date of Patent: August 9, 1988Assignee: Fearing Manufacturing Co., Inc.Inventor: George B. Marks, Sr.
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Patent number: 4755544Abstract: A sustained release preparation comprising:(a) a non-anionic cellulose ether(b) a methoxyethylene-maleic anhydride copolymer or the hydrolyzate thereof, and(c) pharmaceutically active agents.This sustained release preparation can provide the desired sustained-release or dissolution of the pharmaceutically active agents in human organs irrespective of the acidity (i.e., pH conditions) therein.Type: GrantFiled: June 4, 1986Date of Patent: July 5, 1988Assignee: Teijin LimitedInventors: Yuji Makino, Hideo Matugi, Yoshiki Suzuki
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Patent number: 4746513Abstract: Dump release microcapsules are formed of a water-reswellable gel having dispersed therein a sorbtive filler material having a median particle size of not more than 1 micron, such as fumed or precipitated silica. The filler material has an active substance absorbed therein and/or adsorbed thereon. The active material can be 2-chloro-6-(trichloromethyl) pyridine and the gel formed from crosslinked lignin or a lignosulphonate.Type: GrantFiled: April 8, 1986Date of Patent: May 24, 1988Assignee: The Dow Chemical CompanyInventor: Geoffrey W. Smith
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Patent number: 4738897Abstract: A solid polymeric body comprising a polymer matrix containing a water-soluble reagent leachable into a fluid containing condensed water, said matrix being reagent permeative and insoluble in said fluid containing condensed water and the said body preferably having a softening point substantially above that of the temperature of the fluid environment in which it is to be employed is useful for the introduction of an additive reagent into said fluid particularly when said fluid is located in a subterranean formation.Type: GrantFiled: May 13, 1987Date of Patent: April 19, 1988Assignee: Exxon Chemical Patents Inc.Inventors: Lee A. McDougall, John C. Newlove, John A. Haslegrave
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Patent number: 4722865Abstract: A solid substrate, which contains or consists of a biologically or chemically active substance, is coated with coating material containing at least one polymerizable crosslinkable polyfunctional acrylic or methacrylic compound whereafter the coating material is subjected to polymerization substantially in the absence of non-polymerizable components to form a network coating of polymer on the surface of the solid substrate. This coating permits either the controlled release of active substance from the coated substrate or the controlled access of material reacting with said active substance into the coated substrate and the controlled release of the resulting reaction products from the coated substrate.Type: GrantFiled: April 24, 1985Date of Patent: February 2, 1988Assignee: Nederlandse Centrale Organisatie Voor Toegepast-Natuurwetenschappelijkond erzoekInventor: Leendert Huizer
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Patent number: 4722815Abstract: A synthetic resin product contains various substances such as perfumes, insectifuges/insecticides, mold/mildew-proofing agents and anti-fungi agents which are inactivated by forming an inclusion compound thereof in cyclodextrin and coating them with glycitol(s) to thereby prolong the duration period of the substance. A process for the production of the same is further disclosed wherein the glycitol is provided in the form of reduced millet jelly or reduced cyclodextrin millet jelly.Type: GrantFiled: April 20, 1987Date of Patent: February 2, 1988Assignee: Japan Liquid Crystal Co., Ltd.Inventor: Ichiro Shibanai
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Patent number: 4678684Abstract: Disclosed is a method for impregnating a thermoplastic polymer with an impregnation material such as a fragrance or pest control agent or pharmaceutical composition. A thermoplastic polymer is impregnated by (1) dissolving an impregnation material such as a fragrance or pest control agent or pharmaceutical composition material in a volatile swelling agent maintained at or near supercritical conditions for the volatile swelling agent, (2) swelling the thermoplastic polymer by contacting it at or near supercritical conditions for the volatile swelling agent with the impregnation material-laden volatile swelling agent and then (3) reducing the pressure so that the volatile swelling agent diffuses out of the thus impregnated thermoplastic polymer.Type: GrantFiled: March 21, 1986Date of Patent: July 7, 1987Assignee: Hercules IncorporatedInventor: Michael L. Sand
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Patent number: 4670246Abstract: A sprayable insecticidal composition of low fish toxicity of a mixture in water of microcapsules comprised of a pyrethroid (synthetic pyrethrin) contained within an encapsulating wall of a cross-linked polymeric material, and methods of preparation and method of use of the composition on a wide variety of crops and aquatic sites infested with a broad spectrum of undesirable insects.Type: GrantFiled: April 24, 1985Date of Patent: June 2, 1987Assignee: Pennwalt CorporationInventors: Gerd H. Dahl, Joseph Simkin
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Patent number: 4670250Abstract: Impact-resistant microcapsules for the sustained and controlled release of biologically active ingredients through a surrounding permeable polymeric wall are disclosed wherein the ratio by weight of active ingredient to polymer is from about 4:1 to about 1:4, the polymeric walls having high tensile yield and tensile impact strengths and low nitrogen permeabilities.Type: GrantFiled: October 21, 1983Date of Patent: June 2, 1987Assignee: Bend Research, Inc.Inventor: Richard W. Baker