Patents Represented by Attorney James H. Ryan
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Patent number: 5226934Abstract: A process for the separation of elemental sulfur from a gas comprises contacting the gas with molten sulfur whereby to extract the sulfur from the gas.Type: GrantFiled: June 9, 1992Date of Patent: July 13, 1993Assignee: University of DelawareInventor: K. Edward Lefren
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Patent number: 5096726Abstract: Stain of fabrics containing terminal amine groups by foodstuffs and other liquid or moist products that contain a dye having sulfonic acid moieties can be prevented or minimized by also including in the product a sulfonated naphthol- or sulfonated phenol-formaldehyde condensation product in non-toxic quantities.Type: GrantFiled: October 1, 1990Date of Patent: March 17, 1992Assignee: University of DelawareInventors: Robert W. Keown, C. Paul Malone, Lisa L. Oehrl
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Patent number: 4996943Abstract: This application describes a process for the production of a growth medium or cultch for mollusca, particularly oysters, comprising contacting preformed cultch made from coal ash wastes with larvae of the mollusca and permitting the larvae to settle thereupon.Type: GrantFiled: May 18, 1989Date of Patent: March 5, 1991Assignee: University of DelawareInventor: Margaret M. Garvey
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Patent number: 4986617Abstract: Described and claimed is a changing apparatus for an infant or young child comprising an elevated table with means for stimulating the interest of the child in changing or helping to change himself. The means for stimulating interest include steps or a ladder which the child can use by himself to reach the top of the table, an adjustable mirror in which the child can see his reflection and assist in changing himself, and compartments for storing individual items for individual children.Type: GrantFiled: July 12, 1985Date of Patent: January 22, 1991Assignee: University of DelawareInventor: Laura P. McConkey
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Patent number: 4980237Abstract: Polyamide bodies, e.g., foils or sheets, are welding together or laminated by forming methylene bridges between nitrogen atoms in the separate bodies by pressing them together in the presence of a alkaline paraformaldehyde/methanol solution containing a catalytic amount of oxalic acid.Type: GrantFiled: December 7, 1989Date of Patent: December 25, 1990Assignee: University of DelawareInventors: Nadka V. Avramova, Stoyko C. Fakirov, Jerold M. Schultz
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Patent number: 4915885Abstract: A process of preparing a homogeneous amorphous polymeric blend of polyethyleneterephthalate (PET) and polybutyleneterephthalate (PBT) which includes intimately mixing the PET and PBT at a weight ratio of about 10:90-90:10, melting the mixture at 290.degree.-330.degree. C., cooling the mixture to 0.degree.--194.degree. C. by extruding it onto rollers maintained in a cooling bath and orienting the polymer of the resulting continuous shaped object at room temperature to a draw ratio of about 5:1, with subsequent annealing at about 120.degree.-180.degree. C. for about one hour.Type: GrantFiled: June 23, 1988Date of Patent: April 10, 1990Assignee: University of DelawareInventors: Nadka V. Avramova, Isak A. Avramov, Stoyko C. Fakirov, Jerold M. Schultz
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Patent number: 4909863Abstract: Semiconductor films and photovoltaic devices prepared therefrom are provided wherein the semiconductor films have a specular surface with a texture less than about 0.25 micron greater than the average planar film surface and wherein the semiconductor films are surface modified by exposing the surface to an aqueous solution of bromine containing an acid or salt and continuing such exposure for a time sufficient to etch the surface.Type: GrantFiled: July 13, 1988Date of Patent: March 20, 1990Assignee: University of DelawareInventors: Robert W. Birkmire, Brian E. McCandless
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Patent number: 4902369Abstract: Described and claimed are a process for preserving the orientation of a liquid crystal polymer/during lamination which comprises carrying out the lamination bonding at a high temperature below the melting point of the polymer and under pressure of up to about 5 MPa.Type: GrantFiled: June 23, 1988Date of Patent: February 20, 1990Assignee: University of DelawareInventors: Nadka V. Avramova, Stoyko C. Fakirov
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Patent number: 4895612Abstract: Polyamide bodies, e.g., foils or sheets, are welding together or laminated by forming methylene bridges between nitrogen atoms in the separate bodies by pressing them together in the presence of a alkaline paraformaldehyde/methanol solution containing a catalytic amount of oxalic acid.Type: GrantFiled: June 23, 1988Date of Patent: January 23, 1990Assignee: University of DelawareInventors: Nadka V. Avramova, Stoyko C. Fakirov, Jerold M. Schultz
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Patent number: 4844015Abstract: Described is an oyster cultch made from coal-ash wastes substantially as effective as the natural oyster-shell cultch.Type: GrantFiled: November 18, 1987Date of Patent: July 4, 1989Assignee: University of DelawareInventors: Margaret M. Garvey, Kent S. Price, Jr.
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Patent number: 4842789Abstract: Described and claimed is a process for obtaining high-modulus, high-strength linear polycondensates, e.g., polyamides, comprising the sequential steps drawing at room temperature, isothermal annealing at 180.degree.-270.degree. C., a second drawing at room temperature, and a second isothermal annealing at 120.degree.-260.degree. C., an orientation degree after the second drawing being 20-25.Type: GrantFiled: June 23, 1988Date of Patent: June 27, 1989Assignee: University of DelawareInventors: Michail G. Evstatiev, Stoyko C. Fakirov, Jerold M. Schultz
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Patent number: 4778718Abstract: A bendable thin, sheet-like structure having a cementitious matrix reinforced with a three-dimensional fabric of an organic fiber uniformly distributed throughout the thickness of the structure and a continuous process for its production.Type: GrantFiled: March 26, 1987Date of Patent: October 18, 1988Assignee: University of DelawareInventor: Robert L. Nicholls
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Patent number: 4446175Abstract: Low molecular weight isocyanate-functional acrylic polymers prepared by direct reaction of the monomers, e.g., 2-isocyanatoethyl methacrylate and butyl acrylate, in the presence of a mercaptan chain-transfer agent are good coating materials applicable to a substrate as by spraying and curable by contact with moisture.Type: GrantFiled: December 7, 1981Date of Patent: May 1, 1984Assignee: E. I. Du Pont de Nemours and CompanyInventors: Darryl W. Brixius, John A. Simms
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Patent number: 4426478Abstract: Described are high-solids solutions of diol/higher polyol/aromatic acid/aliphawtic acid branched polyesters of carefully controlled composition and suitable as components of organic coatings.Type: GrantFiled: November 3, 1982Date of Patent: January 17, 1984Assignee: E. I. Du Pont de Nemours and CompanyInventors: Paul R. Noyes, Eugene G. Sommerfeld
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Patent number: 4419476Abstract: Disclosed are adhesive systems and adhesives formed from (A) hydroxyl-terminated, preferably branched, polyols, (B) isocyanate-capped, polyol-based urethanes and (C) polyisocyanate crosslinking agents. In their preferred embodiments, they are applicable by direct gravure procedures and are useful in boil-in-bag technology.Type: GrantFiled: August 9, 1982Date of Patent: December 6, 1983Assignee: E. I. Du Pont de Nemours & Co.Inventors: James E. Coughlin, Eugene G. Sommerfeld, Clifford H. Strolle
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Patent number: 4408002Abstract: The gelling of zinc-containing iminated acrylate coating compositions is prevented by including an effective chelating amount of 2,4-pentanedione in the composition.Type: GrantFiled: April 30, 1982Date of Patent: October 4, 1983Assignee: E. I. Du Pont de Nemours and CompanyInventor: Paul E. Wills
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Patent number: 4369232Abstract: Dispersants which improve the gloss of acrylic paints are prepared by reacting the isocyanate groups of monomeric polyisocyanates or isocyanate acrylate polymers with (1) fatty amines, (2) lower alkylamines or alkanolamines and (3), optionally, aminosilanes. A formula for the dispersants may be written as: ##STR1## isocyanate residue, A is fatty amine residue with a=20-80, B is lower alkylamine or alkanolamine residue with b=80-20, and C is aminosilane residue with c=0-40, the sum of a+b+c=100, the (mole) percentage of isocyanate groups replaced.Type: GrantFiled: December 23, 1980Date of Patent: January 18, 1983Assignee: E. I. Du Pont de Nemours and CompanyInventor: Christopher Scopazzi
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Patent number: 4298724Abstract: Described are diol/higher polyol/aromatic acid/aliphatic acid branched polyesters of carefully controlled composition highly soluble in cheap, nontoxic organic solvents and suitable as components of adhesives, e.g., for bonding flexible plastics, and as components of organic coatings.Type: GrantFiled: February 20, 1980Date of Patent: November 3, 1981Assignee: E. I. DuPont de Nemours and CompanyInventors: Eugene G. Sommerfeld, Paul R. Noyes
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Patent number: 4294736Abstract: The reaction rate of the process for making nonlinear polyesters, i.e., conventional alkyds, is accelerated by using relatively large proportions of solvent, e.g., 15-50% by weight of an aromatic or ketonic high boiler, and, optionally, an esterification catalyst, e.g., tin oxalate. The process results in alkyds having more evenly distributed molecular weights with significantly reduced reaction times and at lowered reaction temperatures with consequent energy savings.Type: GrantFiled: March 24, 1980Date of Patent: October 13, 1981Assignee: E. I. Du Pont de Nemours and CompanyInventors: William H. Burgess, III, Philip Heiberger
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Patent number: 4293471Abstract: Stable coating compositions are made from an aqueous dispersion of an alkyd resin (20-80% by weight of solids) neutralized to a pH of about 7.5 with ammonia or a volatile amine by forming therein an emulsion polymer (80-20% by weight of solids) of one or more vinyl monomers. When coated on a substrate, the compositions dry readily like vinyl emulsion polymers but with a glossy and durable finish like the relatively cheap alkyds. Free radical catalysts, e.g., peroxides, may be encapsulated during the emulsion polymerization and remain stable until evaporation of water.Type: GrantFiled: June 16, 1980Date of Patent: October 6, 1981Assignee: E. I. Du Pont de Nemours and CompanyInventor: Philip Heiberger