Chitin Or Derivative Patents (Class 536/20)
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Patent number: 4532321Abstract: A free amino microcrystalline chitin preferably in solid form is obtained. The process may involve the following steps of (1) treating particulate chitin at elevated temperature with phosphoric acid diluted with a lower aliphatic alcohol, (2) treating the resulting chitin with an alkali, (3) washing the chitin to remove the alkali from the chitin emulsion, (4) subjecting the chitin during at least one of the preceding steps to high speed shearing action to convert the processed chitin to the microcrystalline form, and (5) subjecting the resulting microcrystalline chitin emulsion from step 3 to the cycle of freezing and thawing, thereby separating the chitin as a solid from the liquid of the emulsion.Type: GrantFiled: June 14, 1982Date of Patent: July 30, 1985Assignee: University of DelawareInventors: John E. Castle, Jeffrey R. Deschamps
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Patent number: 4528283Abstract: Cosmetic compositions useful for treatment of hair or skin contain macromolecular glyceryl-chitosan having(a) 4-40 Mol-% units of the Formula (I) ##STR1## and (b) 60-96 Mol-% units of the Formula (II) ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and are ##STR3## wherein R.sub.4 and R.sub.5 are the same or different and are ##STR4## wherein either X=H and Y=CH.sub.2 OH, or Y=H and X=CH.sub.2 OH and n=2 to 5, with the proviso that for at least half of the units of the formula II, R.sub.1, R.sub.2 and R.sub.3 are not uniformly H, or their salts with organic or inorganic acids, in a suitable cosmetic carrier. Also disclosed are the compounds per se and a process for their production wherein chitosan composed of 60-96% entacetylated chitin is reacted with glycidol.Type: GrantFiled: June 23, 1983Date of Patent: July 9, 1985Assignee: Wella AktiengesellschaftInventors: Gunther Lang, Harald Wendel, Eugen Konrad
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Patent number: 4493928Abstract: A novel crosslinked polymeric substance and a process for preparing the novel crosslinked polymeric substance are disclosed, the novel crosslinked polymeric substance being prepared from natural chitin or regenerated chitin and the polymeric substance having an amphoteric capability.Type: GrantFiled: June 22, 1982Date of Patent: January 15, 1985Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4474769Abstract: A method of contraception comprising placing in the uterine cavity a contraceptively effective amount of chitosan, advantageously in a carrier, and retaining the chitosan in the uterine cavity for a prolonged period of time to kill or inactivate mammalian spermatazoa.Type: GrantFiled: May 13, 1983Date of Patent: October 2, 1984Assignee: Pfanstiehl Laboratories, Inc.Inventor: Robert L. Smith
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Patent number: 4447562Abstract: Aminopolysaccharides and copolymers thereof, primarily those of N-acetyl-D-glucosamines and derivatives and various monomers, is described.Type: GrantFiled: September 30, 1982Date of Patent: May 8, 1984Inventor: Edward J. Ivani
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Patent number: 4436731Abstract: A new polysaccharide constituted by units of D-glucosammonium salts, prepared from natural chitin. The new product has strong hypocholesterolemic activity.Type: GrantFiled: March 31, 1982Date of Patent: March 13, 1984Assignee: Etablissement TexcontorInventor: Javier E. Maltz
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Patent number: 4424346Abstract: Derivatives have been formed from chitins and chitosans in which the amine residues on the polyglucosamine have been modified to form the groups:(a) --N.dbd.CHR or --NHCH.sub.2 R(b) --NHR'(c) --NHR" and(d) --NH--CH.sub.2 CO.sub.2 H or --NH--glycerylwhereR is an aromatic moiety having at least one hydroxyl or carboxyl group, or a macrocyclic ligandR' is an aldose or ketose residue, and,R" is an organometallic aldehyde residue.These derivatives are useful in chelating metals, in pharmaceutical formulations, in cosmetics, in chromatographic separations, in enzyme immobilization, as catalysts, etc. Galactomannans having selected amine-containing side chains have also been prepared by reductive amination.Type: GrantFiled: June 4, 1981Date of Patent: January 3, 1984Assignee: Canadian Patents and Development Ltd.Inventors: Laurance D. Hall, Mansur Yalpani
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Patent number: 4407978Abstract: Polymeric polydonor complexons having more than six sites in a structural unit are described. The complexons are of the formulae: ##STR1## wherein P is a linear or three-dimensional polymeric skeleton, x is oxygen or an ##STR2## group wherein R is hydrogen, an alkyl group of 1-6 carbon atoms, a phenyl group or a substituted phenyl group. The described complexons are obtained by reaction of a polymeric compound of the formula P --XH wherein P and X are as defined above with a dianhydride of the corresponding complexon in the presence of a tertiary amine and, optionally, an inert solvent.Type: GrantFiled: October 29, 1982Date of Patent: October 4, 1983Assignee: Ceskoslovenska akademie vedInventors: Jaroslav Kahovec, Zdenek Matejka, Josef Tomasek
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Patent number: 4401807Abstract: A shaped material is described having at least a surface layer which consists essentially of an acylated mixture of two or more kinds of chitin derivatives represented by the following formula (1):[(C.sub.6 H.sub.8 O.sub.3 .multidot.(NH.sub.2).sub.x .multidot.(NHCOCH.sub.3).sub.y .multidot.(OR).sub.b ].sub.n (1)wherein R represents a carboxyalkyl group with two to four carbon atoms, a hydroxyethyl group, a hydroxypropyl group, a dihydroxypropyl group or an alkyl group with one to three carbon atoms, x is a number of 0.1 to 1.0, y=1.0-x, a is a number of 0 to 1.0, and b=1.0-a,or a salt thereof.Type: GrantFiled: September 10, 1980Date of Patent: August 30, 1983Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4376199Abstract: Disclosed herein is a novel shaped material of a derivative of chitin obtainable by partially acylating or partially acid-treating a cross-linked ionic chitin derivatives, which is excellent for use as the material for capsules, as material for dialysis carriers and/or as an ion-exchanger resin.Type: GrantFiled: October 17, 1980Date of Patent: March 8, 1983Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4373096Abstract: A novel crosslinked polymeric substance and a process for preparing the novel crosslinked polymeric substance are disclosed, the novel crosslinked polymeric substance being prepared from natural chitin or regenerated chitin and the polymeric substance having an amphoteric capability.Type: GrantFiled: March 24, 1980Date of Patent: February 8, 1983Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4368322Abstract: A method for preparing a chitosan-glucan complex is disclosed, which comprises the steps of subjecting filamentary fungal masses from certain fungal species such as Allomyces, Aspergillus, Penicillium, Mucor, Phycomyces, Choanephora, Zygorrhynchus and like fungi, to a treatment with a concentrated aqueous solution of a strong alkali brought to its boiling point and for a time of from 4 to 6 hours. This treatment removes a number of undesirable components since a deacetylation of chitin occurs, the soluble components being concurrently removed.Foaming substances, if present, may be removed by a preliminary treatment with a solution of strong alkalies, with a lower concentration than that of the solution used for chitin deacetylation.The products thus obtained lend themselves well to the preparation of columns capable of retaining certain compounds or elements, e.g. transition metal ions and can be used for flocculation reaction, in chromatographic reactions and many other uses.Type: GrantFiled: February 23, 1981Date of Patent: January 11, 1983Assignee: Anic, S.p.A.Inventor: Riccardo Muzzarelli
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Patent number: 4365050Abstract: Aminopolysaccharides and copolymers thereof, primarily those of N-acetyl-D-glucosamines and derivatives and various monomers, is described.Type: GrantFiled: July 15, 1981Date of Patent: December 21, 1982Inventor: Edward J. Ivani
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Patent number: 4363801Abstract: Methods and preparations for treating hyperbilirubinemia utilizing chitosan salts as the active agent. A method of preparing the chitosan salts for oral administration in a liquid carrier is disclosed.Type: GrantFiled: February 9, 1981Date of Patent: December 14, 1982Assignee: The Texas A&M University SystemInventor: Joseph J. Nagyvary
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Patent number: 4356236Abstract: A spherically shaped material at least the surface layer of which comprises an acylated product of de-N-acetylated chitin. The spherical material is insoluble in water, acids, alkaline solutions and organic solvents. The materials can be employed to separate materials on a column, as a base material on which enzyme is immobilized and as an adsorbent, etc.Type: GrantFiled: June 4, 1980Date of Patent: October 26, 1982Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4346216Abstract: Osmium carbohydrate complexes prepared by reacting osmium compounds and carbohydrates and their utilization as pharmaceutical compositions for the treatment of heavy metal poisoning and arthritis in mammals. The osmium carbohydrate complexes may also be utilized in X-ray diagnostic procedures as contrast enhancing agents.Type: GrantFiled: June 2, 1980Date of Patent: August 24, 1982Assignee: Research CorporationInventor: Conrad C. Hinckley
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Patent number: 4336070Abstract: A process for producing a porous shaped material of acylated chitin derivative wherein a soluble derivative of chitin is acylated, characterized in that an aqueous solution of the derivative of chitin containing a diluent, a porosity-regulating agent and a surfactant is added into a solution of an organic acid anhydride containing a surfactant.Type: GrantFiled: July 10, 1980Date of Patent: June 22, 1982Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4334061Abstract: A process for recovering polyol fatty acid polyesters from the crude reaction product in which it is produced by contacting with an aqueous washing medium in the presence of an emulsion decreasing organic solvent so that the alkali metal fatty acid soaps and the color-forming bodies are taken into the aqueous phase, and upon settling the phases are separated from each other.Type: GrantFiled: October 29, 1979Date of Patent: June 8, 1982Assignee: Ethyl CorporationInventor: Joseph A. Bossier, III
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Patent number: 4309534Abstract: Renatured chitosan having an optical rotation in solution that is at least 20% more negative than that of untreated chitosan and the process of making same. The process for preparing such renatured chitosan is accomplished by aging a solution of chitosan in an aqueous acid at a pH of about 2.0 to 5.5. It is preferred to age the solution at room temperature for about 2 to 14 days until the optical activity shifts toward the negative by at least about 20%.Type: GrantFiled: February 15, 1979Date of Patent: January 5, 1982Assignee: University of DelawareInventor: Paul R. Austin
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Patent number: 4308377Abstract: A shaped material at the least of which surface layer comprises a denatured chitin obtained by acylation of de-N-acetylated etherified chitin represented by the following general formula:[C.sub.6 H.sub.8 O.sub.3 (NH.sub.2).sub.x (NHCOCH.sub.3).sub.y (OR).sub.a (OH).sub.b ].sub.nwherein R represents a carboxyalkyl group with two to four carbon atoms, a hydroxyethyl group, a hydroxypropyl group, a dihydroxypropyl group or an alkyl group with one to three carbon atoms, x is a number of 0.1 to 1.0, y=1.0-x, a is a number of 0.1 to 1.0, and b=1.0-a,or a salt thereof.Type: GrantFiled: December 19, 1979Date of Patent: December 29, 1981Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4304905Abstract: Disclosed herein a method for preparing carboxyalkylated chitin from chitin and a method for preparing a de-acetylated substance of the carboxyalkylated chitin.Type: GrantFiled: December 17, 1979Date of Patent: December 8, 1981Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4301067Abstract: This invention relates to a poly-ion complex comprising chitin or N-acylchitosan derivative having carboxymethyl and polyelectrolyte.Type: GrantFiled: May 28, 1980Date of Patent: November 17, 1981Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventor: Junichi Koshugi
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Patent number: 4293098Abstract: Active chitin is recovered from shellfish waste in a mechanical process without chemical additives. Shellfish waste is subjected to drying followed by grinding and treatment in an air classifier to separate the same into two major components, one being predominately active chitin and the other being a heavier component of predominately protein and calcium carbonate, which is an enhanced protein meal. A screening process for the first major component further separates most of the calcium salts from the active chitin, and all components are then packaged and stored for further use.Type: GrantFiled: April 20, 1979Date of Patent: October 6, 1981Assignee: Systems Consultants, Inc.Inventor: H. S. Muralidhara
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Patent number: 4286087Abstract: A friable, dispersible microcrystalline chitin powder and a process of making same by treating particulate chitin at an elevated temperature with phosphoric acid, particularly with phosphoric acid diluted with a lower aliphatic alcohol, separating the treated chitin and subjecting same to shearing in an inert liquid medium until a uniform dispersion is obtained, thereafter separating the sheared chitin and drying and grinding same to a fine powder.Type: GrantFiled: September 21, 1979Date of Patent: August 25, 1981Assignee: University of DelawareInventors: Paul R. Austin, Charles J. Brine
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Patent number: 4282351Abstract: A method for preparing a chitosan-glucan complex is disclosed, which comprises the steps of subjecting filamentary fungal masses from certain fungal species such as Allomyces, Aspergillus, Penicillium, Mucor, Phycomyces, Choanephora, Zygorrhynchus and like fungi, to a treatment with a concentrated aqueous solution of a strong alkali brought to its boiling point and for a time of from 4 to 6 hours. This treatment removes a number of undesirable components since a deacetylation of chitin occurs, the soluble components being concurrently removed.Foaming substances, if present, may be removed by a preliminary treatment with a solution of strong alkalies, with a lower concentration than that of the solution used for chitin deacetylation.The products thus obtained lend themselves well to the preparation of columns capable of retaining certain compounds or elements, e.g. transition metal ions and can be used for flocculation reaction, in chromatographic reactions and many other uses.Type: GrantFiled: June 4, 1979Date of Patent: August 4, 1981Assignee: Anic, S.p.A.Inventor: Riccardo Muzzarelli
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Patent number: 4275194Abstract: A novel chitosan-iodine adduct wherein iodine is included in chitosan molecule is useful as a deodorant, a sterilizer or a disinfectant since the adduct holds iodine in a stable form and can release active iodine gradually into the environment as occasion demands. Also, a disinfectant fiber can be produced by sticking the chitosan-iodine adduct onto a fiber.Type: GrantFiled: August 23, 1978Date of Patent: June 23, 1981Assignee: Nihon Tennen Gas Kogyo Co., Ltd.Inventors: Masatada Kato, Nobuaki Mineshima, Tatsuo Kato, Yoshiharu Kawada, Hironori Hanada, Teiichi Inomata
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Patent number: 4267313Abstract: A saccharide derivative having ureido group having 100 to 1% of N-carbamoyl-D-glucosamine unit, 0 to 90% of D-glucosamine unit and 0 to 70% of N-acetyl-D-glucosamine unit. The saccharide derivatives having ureido group can be used as fabricated products, an adhesive agent, a bonding agent, a processing agent, a coating agent, a soil improver, a fertilizer coating material, a water swellable material and a water absorbent.Type: GrantFiled: January 2, 1980Date of Patent: May 12, 1981Assignee: Dainichiseika Color & Chemicals Mfg. Co. Ltd.Inventors: Takanori Sannan, Shojiro Horiguchi
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Patent number: 4232025Abstract: Reaction products of tetrahydro-2-(nitromethylene)-2H-1,3-thiazine and certain oxidized polysaccharides, useful as insecticides.Type: GrantFiled: May 7, 1979Date of Patent: November 4, 1980Assignee: Shell Oil CompanyInventors: James R. Sanborn, Charles H. Tieman
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Patent number: 4223023Abstract: The use of chitosan as a food additive or as a pharmaceutical preparation to reduce the absorption of lipids is disclosed. The chitosan, as such or in the form of fatty acid complex, may be admixed with food in a minor quantity; for example, an amount of about 1 to 10 percent by weight may be incorporated in a pharmaceutical preparation or composition for oral administration in an effective amount to reduce lipid absorption.Type: GrantFiled: October 12, 1978Date of Patent: September 16, 1980Inventor: Ivan Furda
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Patent number: 4195175Abstract: This invention deals with a novel process of manufacturing chitosan from chitin with reduced temperatures, increased reaction rates involving higher alkali-to-solids deacetylation ratios, and a quiescent air-expelled final deacetylation step. Recovery of the alkali is also attainable.Type: GrantFiled: January 3, 1978Date of Patent: March 25, 1980Inventors: Quintin P. Peniston, Edwin L. Johnson
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Patent number: 4165433Abstract: Method for converting dextro rotatory chitin to levo rotatory chitin comprising dissolving chitin in a composition containing dimethyl acetamide, N-methyl-pyrrolidone or mixture thereof and lithium chloride.Type: GrantFiled: September 20, 1977Date of Patent: August 21, 1979Assignee: University of DelawareInventor: Paul R. Austin
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Patent number: 4134412Abstract: Hair setting lotion consisting of an aqueous or aqueous-alcoholic solution of a film-forming resin which contains a water soluble salt of chitosan.Type: GrantFiled: November 18, 1976Date of Patent: January 16, 1979Assignee: Wella AktiengesellschaftInventors: Paul Gross, Eugen Konrad, Herbert Mager
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Patent number: 4125708Abstract: Superoxy-anion-forming metals, such as chromium, manganese, and the like, are removed from materials containing the same by contacting the material with an anionically-modified, nitrogen-containing polymer, such as sulfite-modified, sulfate-modified, or chloride-modified chitosan.Type: GrantFiled: February 15, 1977Date of Patent: November 14, 1978Assignee: The United States of America as represented by the Secretary of AgricultureInventors: Merle S. Masri, Virginia G. Randall
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Patent number: 4119619Abstract: The method for the processing of kriel to produce protein, lipids and chitin comprises emulsification of lipids by intensively stirring kriel in an aqueous medium. The resultant emulsion of lipids is separated from the kriel mass and from the kriel mass proteins are extracted at a pH of 10 to 12. The alkaline extract of proteins is separated from chitin integuments and protein is separated therefrom.Type: GrantFiled: December 8, 1977Date of Patent: October 10, 1978Inventors: Sergei Vasilievich Rogozhin, Efim Semenovich Vainerman, Ljubov Mikhailovna Burmistrova, Jury Alexandrovich Davidovich, Vladimir Jurievich Ryashentsev, Valentina Kirillovna Kulakova, Lev Lvovich Lagunov, Vladimir Petrovich Bykov
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Patent number: 4076930Abstract: Hydroxyalkyl ethers of hydroxyalkoxy polysaccharides are prepared by reacting the corresponding polysaccharide first with an epoxide in an aqueous alkaline medium, and then with an epoxide in the presence of a Lewis acid catalyst in a nonaqueous, nonalcoholic organic solvent. The resulting products are hydrophobic and strongly lipophilic, and are outstanding substrates for liquid-gel chromatography.Type: GrantFiled: January 29, 1971Date of Patent: February 28, 1978Inventors: James Ellingboe, Ernst Holger Nystrom, Jan Bertil Sjovall
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Patent number: 4066735Abstract: This disclosure is concerned with the demineralization of crustacea shells and the like, before or after protein removal therefrom, with sulfurous acid, thus to convert the calcium carbonate of the shell to calcium bisulfite solution which may be separated from the solid residual shell, and regenerating sulfurous acid from the said solution for reuse in the process.Type: GrantFiled: November 15, 1976Date of Patent: January 3, 1978Inventors: Quintin P. Peniston, Edwin Lee Johnson
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Patent number: 4063016Abstract: New compositions of matter comprising complexes of chitin with lower molecular weight alcohols, aldehydes and ketones have been discovered. These complexes are useful in the solution and purification of chitin and in the preparation of modified chitins for fibers, films and plastics, and for pharmaceutical purposes.Type: GrantFiled: December 15, 1975Date of Patent: December 13, 1977Assignee: University of DelawareInventor: Paul R. Austin
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Patent number: 4059097Abstract: Natural or synthetic rubber surgical elements such as tubing, catheters, drains and gloves are "lubricated" so as to prevent sticking during storage, and permit easier emplacement, such as putting on the gloves by a surgeon or nurse, by applying to the surface of the rubber elementA finely divided biodegradable powder consisting essentially ofAn enzymatically degradable form of poly(N-acetyl-D-glucosamine) selected from the group consisting ofPoly[N-acetyl-6-0-(carboxymethyl)-D-glucosamine],Poly[N-acetyl-6-0-(2'-hydroxyethyl)-D-glucosamine],Poly[N-acetyl-6-0-(ethyl)-D-glucosamine], andPoly(N-acetyl-D-glucosamine) itselfThis powder is readily absorbed by living tissue without deleterious tissue reaction, thus minimizing tissue reaction from the transfer of the powder from the element such as a glove to internal sites in a subject. The gloves may be packaged in a strippable laminate package. The polymers are derived from chitin.Type: GrantFiled: November 3, 1976Date of Patent: November 22, 1977Assignee: American Cyanamid CompanyInventor: Donald James Casey
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Patent number: 4059457Abstract: Solutions of chitin in dimethylacetamide, N-methylpyrrolidone or mixtures of these in combination with a minor proportion of lithium chloride.Type: GrantFiled: September 30, 1976Date of Patent: November 22, 1977Assignee: The University of DelawareInventor: Paul Rolland Austin
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Patent number: 4029727Abstract: A new method for producing high-strength films, fibers and other shaped articles from chitin has been discovered, whereby an anhydrous solution of chitin is made into the desired shape, the chitin is insolubilized with an organic non-solvent for the chitin and the resultant shaped article, if desired, is oriented, by cold drawing until its properties, such as tensile strength, are substantially enhanced. The films, fibers, and other shaped articles capable of being oriented or in oriented form, are novel and useful in such applications as food wrap and surgical sutures.Type: GrantFiled: April 16, 1975Date of Patent: June 14, 1977Assignee: The University of DelawareInventors: Paul Roland Austin, Charles James Brine
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Patent number: 4027068Abstract: A method of using chitin derivatives as defoggers for clear surfaces and as deodorizers is disclosed.Type: GrantFiled: September 12, 1975Date of Patent: May 31, 1977Assignee: American Cyanamid CompanyInventor: Hosny Younes Saad