Patents by Inventor Neville Everton Drysdale

Neville Everton Drysdale 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: 20090143562
    Abstract: This invention relates to the production of poly(trimethylene carbonate) glycol via the polymerization of trimethylene carbonate employing one or more acidic ion exchange resin catalysts in the presence of a solvent. The products formed are substantially free of these catalysts.
    Type: Application
    Filed: November 25, 2008
    Publication date: June 4, 2009
    Applicant: E. I. DuPont de Nemours and Company
    Inventors: Robert DiCosimo, Neville Everton Drysdale, Hari Babu Sunkara
  • Publication number: 20090143564
    Abstract: This invention relates to solventless processes for the polymerization of an unsubstituted or substituted trimethylene carbonate to an unsubstituted or substituted poly(1,3-propanediol carbonate 1,3-propanediol ether)diol, using one or more solid acid catalysts.
    Type: Application
    Filed: November 25, 2008
    Publication date: June 4, 2009
    Applicant: E. I. DuPont de Nemours and Company
    Inventors: Robert DiCosimo, Neville Everton Drysdale, Hari Babu Sunkara
  • Patent number: 7504459
    Abstract: The present invention relates to the use of (meth)acrylate functionalized amide acetals as reactive components with crosslinking agents to give new coatings compositions.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: March 17, 2009
    Assignee: E.I. Du Pont de Nemours & Company
    Inventors: Neville Everton Drysdale, Laura Ann Lewin, Robert John Barsotti
  • Patent number: 7504440
    Abstract: The present invention relates to novel poly(meth)acrylate compositions formed by polymerization of (meth)acrylate amide acetals.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: March 17, 2009
    Assignee: E.I. du Pont de Nemours & Company
    Inventors: Neville Everton Drysdale, Laura Ann Lewin, Robert John Barsotti, Patrick Henry Corcoran
  • Publication number: 20080287622
    Abstract: The present process is directed to preparation of addition polymers in diluents that are subsequently reactive in coatings during cure, instead of in traditional hydrocarbon solvents. The polymers so prepared can be used as the main film-forming polymer in high solids coating compositions, especially those useful for finishing automobiles and truck exteriors.
    Type: Application
    Filed: December 7, 2007
    Publication date: November 20, 2008
    Inventors: Jeffery W. Johnson, Robert R. Matheson, Donald A. White, Neville Everton Drysdale, Patrick Henry Corcoran, Laura Ann Lewin
  • Patent number: 7355050
    Abstract: The present invention, in one aspect, is a composition comprising (meth)acrylate amide acetals. Acetals of the present invention are useful as components in coatings for automotive and architectural structures. Coatings comprising components of the present invention cure rapidly with low VOC emissions. In another aspect, the present invention provides a process for making (meth)acrylate amide acetals described herein.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: April 8, 2008
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Laura Ann Lewin, Robert John Barsotti, Charles J. Brandenburg
  • Patent number: 7230112
    Abstract: Described in this invention is a catalytic process for making amide acetals from nitrites and diethanolamines. Amide acetals can be further crosslinked by hydrolyzing the amide acetal groups, and subsequently reacting the hydroxyl groups and/or the amine functions that are formed, to crosslink the composition.
    Type: Grant
    Filed: October 7, 2004
    Date of Patent: June 12, 2007
    Assignee: E. I. duPont de Nemours and Company
    Inventors: Douglas J. Adelman, Neville Everton Drysdale, Christian Peter Lenges, Mark A. Scialdone, Leen Tanghe, Jozef Theresia Huybrechts, Laura Ann Lewin, Robert John Barsotti
  • Patent number: 7148316
    Abstract: The present invention relates to the preparation of hydroxy-functionalized amide acetals from bis-(beta hydroxy)amines and hydroxyl containing moieties.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: December 12, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Laura Ann Lewin, Robert John Barsotti
  • Patent number: 7135530
    Abstract: The present invention relates to polymeric/oligomeric methacrylate functionalized amide acetals are effective in preparing coating composition based on their reaction with isocyanates.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: November 14, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Laura Ann Lewin, Robert John Barsotti, Patrick Henry Corcoran
  • Patent number: 7129290
    Abstract: Polymeric compositions containing spiroorthocarbonate groups and another functional group which reacts with hydroxyl groups are readily crosslinked on contact with water. These compositions are useful as sealants, coatings and encapsulants.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: October 31, 2006
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert John Barsotti, Patrick Henry Corcoran, Neville Everton Drysdale, Laura Ann Lewin
  • Publication number: 20060069266
    Abstract: The present invention relates to the preparation of hydroxy-functionalized amide acetals from bis-(beta hydroxy)amines and hydroxyl containing moieties.
    Type: Application
    Filed: September 30, 2005
    Publication date: March 30, 2006
    Inventors: Neville Everton Drysdale, Laura Ann Lewin, Robert Barsotti
  • Publication number: 20040059067
    Abstract: Polymeric compositions containing spiroorthocarbonate groups and another functional group which reacts with hydroxyl groups are readily crosslinked on contact with water. These compositions are useful as sealants, coatings and encapsulants.
    Type: Application
    Filed: July 9, 2003
    Publication date: March 25, 2004
    Inventors: Robert John Barsotti, Patrick Henry Corcoran, Neville Everton Drysdale, Laura Ann Lewin
  • Patent number: 6194124
    Abstract: The invention is directed to polymer comprising the repeat unit wherein each of R1 through R7 are independently hydrogen or alkyl, and R8 is hydrogen or methyl. The invention is further directed to a photosensitive composition comprising an admixture of: (a) finely divided particles if inorganic solids selected from the group consisting of ceramic, metal, metal oxide or metal alloy; (b) finely divided particles of an inorganic binder having a glass transition temperature in the range of form 550 to 825° C. a surface area to weight ratio of no greater than 10 m2/g and at least 95 wt. % of the particles having a size of 1-10 &mgr;m, dispersed in an organic vehicle comprising; (c) polymer as recited herein above; (d) photoinitiation system; (e) organic medium. With removal of the organic medium the above composition can be utilized for a tape.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: February 27, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John Haetak Choi, Neville Everton Drysdale
  • Patent number: 6191231
    Abstract: Fluorine containing terminal olefins may be grafted onto polymers containing hydrogen bound to carbon in the presence of free radicals. The olefins may also contain other functional groups. The resulting novel grafted polymers are useful as molding resins, for coating and as catalysts.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: February 20, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Lin Wang, Zhen Yu Yang
  • Patent number: 6111135
    Abstract: Disclosed is a process for manufacturing an ester of 1,3-propanediol, comprising, contacting at a temperature of about 0.degree. C. to about 250.degree. C., ethylene, formaldehyde or a form of formaldehyde, a carboxylic acid, and a compound of the formula MZ.sub.n.Q.sub.t, wherein:M is a zirconium[IV], cobalt[II], vanadium[IV], bismuth[II], tin[II], a rare earth metal, scandium or yttrium;n is the oxidation state of M;at least one of Z is an anion of the formula R.sup.1 SO.sub.3.sup.- or R.sup.1 CO.sub.2.sup.-, wherein R.sup.1 is hydrocarbyl or substituted hydrocarbyl containing 1 to 20 carbon atoms or part of a polymer, and the remainder of Z is oxo or one or more monovalent anions;Q is a neutral ligand; andt is 0 or an integer of 1 to 12.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: August 29, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Douglas J. Adelman, Neville Everton Drysdale
  • Patent number: 6040419
    Abstract: An improved process for the polymerization of cyclic ethers to polyethers using strong Bronsted acid catalysts is disclosed. The catalysts are fluorinated sulfonic acid containing polymers. The resulting polyethers are useful as monomers and in adhesives.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: March 21, 2000
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Lin Wang, Zhen-Yu Yang
  • Patent number: 5990264
    Abstract: Poly(ester-ethers) are produced by the copolymerization of tetrahydrofurans and cyclic carboxylic anhydrides using selected metal perfluoroalkylsulfonates and related compounds as catalysts. The resulting copolymers are useful as intermediates for monomers for use in other polymerizations.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: November 23, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Neville Everton Drysdale
  • Patent number: 5770678
    Abstract: A process for polymerizing oxiranes, oxetanes, oxepanes, dioxolanes, trioxanes, and tetrahydrofurans to their respective polymers by contacting them with a selected metal compound is disclosed; and also a process for depolymerizing polytetrahydrofurans to monomeric tetrahydrofurans by contacting the polymer with a selected metal compound at a temperature of about 100.degree. C. to about 250.degree. C. The catalysts may be in solution or part of a heterogeneous solid, and selected organic compounds are used as accelerators in the polymerizations. The polymeric products, some of which are novel, may be used as polyether monomers for further polymerization, as by reaction with isocyanates to produce polyurethanes, and other useful polymers. Some of the polymeric products are relatively high in molecular weight and are suitable for direct use, for instance as spandex fibers.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: June 23, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Richard Edmund Bockrath, Norman Herron, Joel David Citron
  • Patent number: 5677412
    Abstract: Poly(ether-urethanes) can be made from cyclic ethers and organic isocyanates by using selected metal compounds as catalysts. Polymers useful as thermoplastic elastomers, spandex fibers or urethane rubbers can be made by reacting diisocyanates containing functional groups with a tetrahydrofuran, especially tetrahydrofuran itself. The invention also discloses an improved process for the cationic polymerization of a cyclic ether by using an organic isocyanate.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: October 14, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Neville Everton Drysdale
  • Patent number: 5641853
    Abstract: A process for polymerizing oxepanes, dioxolanes, trioxanes, and tetrahydrofurans to their respective polymers by contacting them with a selected metal compound and an accelerator which is a selected vinyl ester or a selected phosphorous compound.
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: June 24, 1997
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Neville Everton Drysdale