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).

  • Publication number: 20210214892
    Abstract: Disclosed is a through-air dryer shower assembly disposed within the through-air dryer and enables efficient cleaning of the through-air dryer without having an operator enter the dyer. The shower may comprise an elongated shower conduit having a plurality of nozzles disposed thereon and may be affixed to a baffle disposed within the through-air dryer cylinder. The shower assembly is generally positioned to spray a pressurized stream of wash fluid against the interior surface of the dryer causing debris accumulated within the deck to flow through the structure to the outer surface for discharge.
    Type: Application
    Filed: January 9, 2020
    Publication date: July 15, 2021
    Inventors: Mark K. Dawson, Richard M. Hansen, Daniel D. Jacobson, Jonathan P. Godden, Lori M. Willis, Molly S. Mooren, Raymond G. Heckner, Stephen J. Reilly
  • Patent number: 6074800
    Abstract: 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: Grant
    Filed: April 23, 1998
    Date of Patent: June 13, 2000
    Assignee: International Business Machines Corporation
    Inventors: 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
  • Patent number: 5420232
    Abstract: 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: Grant
    Filed: April 29, 1992
    Date of Patent: May 30, 1995
    Assignee: International Business Machines Corporation
    Inventors: Daniel J. Dawson, Richard A. DiPietro
  • Patent number: 5391464
    Abstract: 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: Grant
    Filed: December 28, 1993
    Date of Patent: February 21, 1995
    Assignee: International Business Machines Corporation
    Inventors: Ali Afzali-Ardakani, Phillip J. Brock, Daniel J. Dawson, Jeffrey D. Gelorme
  • Patent number: 5270151
    Abstract: 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: Grant
    Filed: March 17, 1992
    Date of Patent: December 14, 1993
    Assignee: International Business Machines Corporation
    Inventors: Peter A. Agostino, Ajay P. Giri, Hiroyuki Hiraoka, Carlton G. Willson, Daniel J. Dawson
  • Patent number: 5023360
    Abstract: 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: Grant
    Filed: May 1, 1990
    Date of Patent: June 11, 1991
    Assignee: International Business Machines Corporation
    Inventors: Thomas H. Baum, Phillip J. Brock, Daniel J. Dawson
  • Patent number: 4578515
    Abstract: 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: Grant
    Filed: June 7, 1984
    Date of Patent: March 25, 1986
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Daniel J. Dawson, Kenneth M. Otteson
  • Patent number: 4532128
    Abstract: 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: Grant
    Filed: September 17, 1984
    Date of Patent: July 30, 1985
    Assignee: Dynapol
    Inventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson
  • Patent number: 4526933
    Abstract: 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: Grant
    Filed: February 17, 1984
    Date of Patent: July 2, 1985
    Assignee: Dynapol
    Inventors: Patricia C. Wang, Daniel J. Dawson
  • Patent number: 4490557
    Abstract: 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: Grant
    Filed: November 5, 1981
    Date of Patent: December 25, 1984
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Kenneth M. Otteson
  • Patent number: 4489197
    Abstract: 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: Grant
    Filed: February 17, 1984
    Date of Patent: December 18, 1984
    Assignee: Dynapol
    Inventors: Patricia C. Wang, Daniel J. Dawson
  • Patent number: 4482680
    Abstract: 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: Grant
    Filed: April 13, 1983
    Date of Patent: November 13, 1984
    Assignee: Dynapol
    Inventors: Bernard G. Sheldon, Robert E. Wingard, Jr., Ned M. Weinshenker, Daniel J. Dawson
  • Patent number: 4397997
    Abstract: 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: Grant
    Filed: November 4, 1981
    Date of Patent: August 9, 1983
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Phillip J. Brock
  • Patent number: 4393174
    Abstract: 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: Grant
    Filed: November 9, 1981
    Date of Patent: July 12, 1983
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Phillip J. Brock
  • Patent number: 4393175
    Abstract: 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: Grant
    Filed: September 9, 1981
    Date of Patent: July 12, 1983
    Assignee: Dynapol
    Inventors: Phillip J. Brock, Daniel J. Dawson
  • Patent number: 4381185
    Abstract: 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: Grant
    Filed: June 9, 1981
    Date of Patent: April 26, 1983
    Assignee: Dynapol
    Inventors: Sally A. Swanson, Ned M. Weinshenker, Robert E. Wingard, Jr., Daniel J. Dawson
  • Patent number: 4302399
    Abstract: 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: Grant
    Filed: March 10, 1980
    Date of Patent: November 24, 1981
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Robert E. Wingard, Guy A. Crosby
  • Patent number: 4275002
    Abstract: 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: Grant
    Filed: January 17, 1977
    Date of Patent: June 23, 1981
    Assignee: Dynapol
    Inventors: Richard D. Gless, Jr., Daniel J. Dawson, Robert E. Wingard
  • Patent number: 4250327
    Abstract: 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: Grant
    Filed: January 2, 1979
    Date of Patent: February 10, 1981
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Kenneth M. Otteson, Roman Davis
  • Patent number: 4233328
    Abstract: 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: Grant
    Filed: October 4, 1978
    Date of Patent: November 11, 1980
    Assignee: Dynapol
    Inventors: Daniel J. Dawson, Kenneth M. Otteson, Roman Davis