Patents by Inventor Daniel J. Dawson
Daniel J. Dawson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6074800Abstract: Several mid UV photo acid generators (PAGs), a chemically amplified photo resist (CAMP), and method for improving nested to isolated line bias are provided. Similarly, photo speed may also be improved. Unlike conventional mid UV PAGs, the present invention's PAG compounds, resist composition, and method do not require a mid UV sensitizer. Specifically, PAGs are provided that bear a chromophore capable of receiving mid UV radiation, particularly I-line, and that are suitable for use in a chemically amplified photo resist having a photo speed of 500 mJ/cm.sup.2 or less, but preferrably 200 mJ/cm.sup.2 or less. For example, the PAGs can be a sulfonium or iodonium salt, such as anthryl, butyl, methyl sulfonium triflate and bis(4-t-butylphenyl)iodonium 9,10-dimethoxyanthracene sulfonate.Type: GrantFiled: April 23, 1998Date of Patent: June 13, 2000Assignee: International Business Machines CorporationInventors: Gregory Breyta, Phillip J. Brock, Daniel J. Dawson, Ronald A. DellaGuardia, Charlotte R. DeWan, Andrew R. Eckert, Hiroshi Ito, Premlatha Jagannathan, Leo L. Linehan, Kathleen H. Martinek, Wayne M. Moreau, Randolph J. Smith
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Patent number: 5420232Abstract: The present invention relates to an improved process for making polyamic ester comprising reacting an aromatic diester diacid halide with the monohydrohalide salt of an aromatic diamine in the presence of a base. The polyamic ester can be imidized to form a polyimide suitable for use in electronic components.Type: GrantFiled: April 29, 1992Date of Patent: May 30, 1995Assignee: International Business Machines CorporationInventors: Daniel J. Dawson, Richard A. DiPietro
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Patent number: 5391464Abstract: The present invention relates to thioxanthone sensitizers for radiation sensitive polyimide compositions for use in manufacturing integrated circuits such as chips, thin film packaging and printed circuit boards.Type: GrantFiled: December 28, 1993Date of Patent: February 21, 1995Assignee: International Business Machines CorporationInventors: Ali Afzali-Ardakani, Phillip J. Brock, Daniel J. Dawson, Jeffrey D. Gelorme
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Patent number: 5270151Abstract: Reaction products of organosilane compounds or polydiphenylsilazane compounds and a novolac resin having phenolic groups can be used as O.sub.2 RIE barrier materials in semiconductor etching processes. These materials have low O.sub.2 etch rates and can be spun on to form crack-free thick layers. Particular RIE barrier materials contemplated have the general formula: ##STR1## wherein A is a methyl or phenyl group.Type: GrantFiled: March 17, 1992Date of Patent: December 14, 1993Assignee: International Business Machines CorporationInventors: Peter A. Agostino, Ajay P. Giri, Hiroyuki Hiraoka, Carlton G. Willson, Daniel J. Dawson
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Patent number: 5023360Abstract: Dialkyl gold(III) .beta.-diketonates are synthesized in a two-step, one-pot process using a gold trihalide, an alkyl lithium compound and a .beta.-diketone.Type: GrantFiled: May 1, 1990Date of Patent: June 11, 1991Assignee: International Business Machines CorporationInventors: Thomas H. Baum, Phillip J. Brock, Daniel J. Dawson
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Patent number: 4578515Abstract: Ethylidene bisformamide is prepared by reacting, at elevated temperatures, dry acetaldehyde and formamide in the presence of an acidic catalyst and an ammonia scavenger such as acetic anhydride. The bisformamide is recovered as a bottoms product of high speed low residence time distillation techniques, e.g., wiped film evaporation. The resulting ethylidene bisformamide may be cracked to N-vinylformamide, which monomer is useful in the preparation of active polymers and copolymers, including poly(vinylformamide) which can be hydrolyzed to poly(vinylamine) salts by contact with acid. These amine salts can then be converted to the free amines, which are precursors of polymeric dyes and pharmaceuticals.Type: GrantFiled: June 7, 1984Date of Patent: March 25, 1986Assignee: Air Products and Chemicals, Inc.Inventors: Daniel J. Dawson, Kenneth M. Otteson
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Patent number: 4532128Abstract: Polymeric quaternary ammonium compounds having recurring vinylbenzyl ammonium units are disclosed. The quaternary ammonium units preferably have 2 alkyl substituents of 1 to 4 carbons and 1 alkyl substituent of 4 to 12 carbons. These materials have antimicrobial properties and are particularly useful for preserving ophthalmic solutions.Type: GrantFiled: September 17, 1984Date of Patent: July 30, 1985Assignee: DynapolInventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson
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Patent number: 4526933Abstract: Polymer compounds which have recurring ##STR1## units are disclosed. These polymers provide active methylene groups which serve as points of attachment for organic groups--particularly azo functionality-containing groups. These azo links can be cleaved by bacteria in the mammalian lower bowel, thereby releasing the corresponding amino groups. This mechanism can effect programmed delivery of pharmaceutically desirable species to the lower bowel.Type: GrantFiled: February 17, 1984Date of Patent: July 2, 1985Assignee: DynapolInventors: Patricia C. Wang, Daniel J. Dawson
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Patent number: 4490557Abstract: Ethylidene bisformamide is prepared by reacting, at elevated temperatures, dry acetaldehyde and formamide in the presence of an acidic catalyst and an ammonia scavenger such as acetic anhydride. The bisformamide is recovered as a bottoms products of high speed low residence time distillation techniques, e.g., wiped film evaporation. The resulting ethylidene bisformamide may be cracked to N-vinylformamide, which monomer is useful in the preparation of active polymers and copolymers, including poly(vinylformamide) which can be hydrolyzed to poly(vinylamine) salts by contact with acid. These amine salts can then be converted to the free amines, which are precursors of polymeric dyes and pharmaceuticals.Type: GrantFiled: November 5, 1981Date of Patent: December 25, 1984Assignee: DynapolInventors: Daniel J. Dawson, Kenneth M. Otteson
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Patent number: 4489197Abstract: Polymeric compounds which have recurring ##STR1## units, wherein X is N or O, R.sub.1, R.sub.2 and R.sub.3 are hydrogens or lower alkyls and R.sub.4 is ##STR2## and aromatic amine or an aromatic hydrazine which provides X as N. These polymers provide active methylene groups which serve as points of attachment for organic groups-particularly azo functionality-containing groups. These azo links can be cleaved by bacteria in the mammalian lower bowel, thereby releasing the corresponding amino groups. This mechanism can effect programmed delivery of pharmaceutically desirable species to the lower bowel.Type: GrantFiled: February 17, 1984Date of Patent: December 18, 1984Assignee: DynapolInventors: Patricia C. Wang, Daniel J. Dawson
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Patent number: 4482680Abstract: Polymeric quaternary ammonium compounds having recurring vinylbenzyl ammonium units are disclosed. The quaternary ammonium units preferably have 2 alkyl substituents of 1 to 4 carbons and 1 alkyl substituent of 4 to 12 carbons. These materials have antimicrobial properties and are particularly useful for preserving ophthalmic solutions.Type: GrantFiled: April 13, 1983Date of Patent: November 13, 1984Assignee: DynapolInventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson
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Patent number: 4397997Abstract: Polymeric diazonium salts are coupled to coupling agents without complications of precipitation by injecting a diazonium salt solution into a substantial volume excess of the coupling agent solution immediately adjacent to the impellor of a centrifugal pump or the like.Type: GrantFiled: November 4, 1981Date of Patent: August 9, 1983Assignee: DynapolInventors: Daniel J. Dawson, Phillip J. Brock
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Patent number: 4393174Abstract: Pendant amide polymers, especially polymers containing N-vinylacetamide, N-alkyl-N-vinylacetamide, or N-vinyl-formamide units, are hydrolyzed to pendant amine polymers, especially vinylamine polymers by contact with strong aqueous base at elevated temperature.Type: GrantFiled: November 9, 1981Date of Patent: July 12, 1983Assignee: DynapolInventors: Daniel J. Dawson, Phillip J. Brock
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Patent number: 4393175Abstract: An improvement in the diazotization of polymeric amines is disclosed that minimizes crosslinking problems. Solutions of nitrite ion and polymeric amine are concurrently continuously fed at controlled rates to a turbulently agitated limited volume mixing zone.Type: GrantFiled: September 9, 1981Date of Patent: July 12, 1983Assignee: DynapolInventors: Phillip J. Brock, Daniel J. Dawson
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Patent number: 4381185Abstract: Water-fast printing of paper stock using a colorant solution containing water-soluble polymeric dyes is accomplished by a three step process. Step 1 is selecting a paper stock characterized as containing at least 250 ppm by weight of cation, particularly a polyvalent metal cation (especially Ca.sup.2+ or Al.sup.3+). In step 2, a colorant solution is applied to the paper. This solution is water-based, containing up to 30 wt % of an organic paper-penetrating agent (such as an alkanol), and at least 500 ppm of one or more anionic group-possessing polymeric colorants. In step 3, the solvent is exhausted by either evaporation (which may be aided by the application of heat) or diffusion into the paper stock, or by a combination of both.Type: GrantFiled: June 9, 1981Date of Patent: April 26, 1983Assignee: DynapolInventors: Sally A. Swanson, Ned M. Weinshenker, Robert E. Wingard, Jr., Daniel J. Dawson
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Patent number: 4302399Abstract: Acetylation of residual primary and secondary alkyl amine groups in polymeric colorants, when said colorants are in the form of a crude preparation reaction mixture, is disclosed. The acetylation improves the colorants' water solubility.Type: GrantFiled: March 10, 1980Date of Patent: November 24, 1981Assignee: DynapolInventors: Daniel J. Dawson, Robert E. Wingard, Guy A. Crosby
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Patent number: 4275002Abstract: Polymeric colorants are prepared by the process of (a) reacting acetaldehyde and acetamide in a mole ratio of 1:2-4 with an acid catalyst to form ethylidene-bis-acetamide, (b) cracking the ethylidene-bis-acetamide to vinylacetamide, (c) polymerizing the vinylacetamide with a free-radical catalyst, (d) hydrolyzing the resulting polymer with mineral acid and neutralizing with base to yield poly(vinylamine), and (e) coupling monomeric optically chromophoric groups to amine nitrogens of the poly(vinylamine).Type: GrantFiled: January 17, 1977Date of Patent: June 23, 1981Assignee: DynapolInventors: Richard D. Gless, Jr., Daniel J. Dawson, Robert E. Wingard
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Patent number: 4250327Abstract: A group of water-soluble polymeric yellow colors and their preparation is disclosed. These colors comprise a plurality of units of a chromophore of the formula ##STR1## wherein M.sup.+ is a pharmaceutically acceptable monovalent cation attached directly to amine units present in a nonchromophoric polymer backbone. In a preferred embodiment of the invention the backbone is a homopolymer or copolymer of vinylamine. These colorants find special utility as nonabsorbable colorants for edibles, especially foods and beverages, where their yellow hue is an excellent color match for existing monomeric azo food colors such as tartrazine, and as components of acid-insoluble pigment lakes which are themselves suitable for use in edibles.Type: GrantFiled: January 2, 1979Date of Patent: February 10, 1981Assignee: DynapolInventors: Daniel J. Dawson, Kenneth M. Otteson, Roman Davis
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Patent number: 4233328Abstract: A group of water-soluble polymeric yellow colors and their preparation is disclosed. These colors comprise a plurality of units of a chromophore of the formula ##STR1## wherein M.sup.+ is a pharmaceutically acceptable monovalent cation, attached directly to amine units present in a nonchromophoric polymer backbone. In a preferred embodiment of the invention the backbone is a homopolymer or copolymer of vinylamine. These colorants find special utility as nonabsorbable colorants for edibles, especially foods and beverages, where their yellow hue is an excellent color match for existing monomeric azo food colors such as tartrazine, and as components of acid-insoluble pigment lakes which are themselves suitable for use in edibles.Type: GrantFiled: October 4, 1978Date of Patent: November 11, 1980Assignee: DynapolInventors: Daniel J. Dawson, Kenneth M. Otteson, Roman Davis
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Patent number: RE30362Abstract: Poly(vinylamine salts of mineral acids are produced by reacting acetaldehyde and acetamide at a mole ratio of 1:2-4 with acid catalyst, cracking the ethylidene-bisacetamide which results into vinylacetamide, polymerizing the vinylacetamide with a free radical polymerization catalyst, and hydrolyzing the poly(vinylacetamide) to the desired amine salts by contacting the polyvinylacetamide with an aqueous solution of the corresponding mineral acid. This product may be converted to the free amine, which in turn may function as a precursor in the manufacture of certain polymeric dyes and colorants.Type: GrantFiled: April 17, 1979Date of Patent: August 5, 1980Assignee: DynapolInventors: Richard D. Gless, Jr., Daniel J. Dawson, Robert E. Wingard, Jr.