Patents by Inventor Stuart J. Hartman

Stuart J. Hartman 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).

  • EPOXY SEALER/HEALER FOR SEALING AND STRENGTHENING CRACKED CONCRETE
    Publication number: 20100204417
    Abstract: An epoxy sealer/healer formulation for sealing and strengthening cracked concrete. This sealer/healer has reduced fuming and exhibits a lower exotherm.
    Type: Application
    Filed: November 9, 2009
    Publication date: August 12, 2010
    Applicant: Sika Technology AG
    Inventors: Stuart J. Hartman, David C. Elmendorf, Steven A. Rosenberg
  • Ultra-low viscosity epoxy sealer/healer
    Patent number: 6068885
    Abstract: An epoxy sealer/healer formulation for sealing and strengthening cracked concrete comprising an epoxy resin, an amine and a dialkylene triamine-alkylene oxide adduct, where the formulation provides a modulus and/or compressive strength at least that of uncracked concrete and effective for penetrating a concrete crack at a rate of at least 10 mm/min for a crack 0.5 mm wide when applied by gravity feed. The epoxy sealer/healer preferably has a viscosity of less than 100 centipoise and a tack-free time of less than 12 hours. The epoxy sealer/healer is advantageous in being able to bond to moist concrete surfaces. A method of using the epoxy sealer/healer for sealing and restoring the strength of cracked concrete is also set forth.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: May 30, 2000
    Assignee: Sika Corporation USA
    Inventors: Stuart J. Hartman, Michael C. Coddington, David C. Elmendorf, Norman Blank
  • Ultra-low viscosity epoxy sealer/healer
    Patent number: 5962602
    Abstract: An epoxy sealer/healer formulation for sealing and strengthening cracked concrete comprising an epoxy resin, an amine and a dialkylene triamine-alkylene oxide adduct, where the formulation provides a modulus and/or compressive strength at least that of uncracked concrete and effective for penetrating a concrete crack at a rate of at least 10 mm/min for a crack 0.5 mm wide when applied by gravity feed. The epoxy sealer/healer preferably has a viscosity of less than 100 centipoise and a tack-free time of less than 12 hours. The epoxy sealer/healer is advantageous in being able to bond to moist concrete surfaces. A method of using the epoxy sealer/healer for sealing and restoring the strength of cracked concrete is also set forth.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: October 5, 1999
    Assignee: Sika Corporation USA
    Inventors: Stuart J. Hartman, Michael C. Coddington, David C. Elmendorf, Norman Blank
  • Polythiols and use as epoxy resin curing agents
    Patent number: 4927902
    Abstract: Polythiols prepared by the reaction of hydrogen sulfide or organic dithiols with polyglycidyl substituted amines have been found to be outstanding curing agents for epoxy resins. Epoxy resins cured with these polythiols are characterized by not only improved gel times, but also improved cure rates, better heat resistance and greater resistance to absorption of water.A useful polythiol is the reaction product of N,N,N',N'-tetraglycidyl-m-xylylenediamine with hydrogen sulfide.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: May 22, 1990
    Assignee: Henkel Corporation
    Inventors: Grannis S. Johnson, Reuben H. Grinstein, Stuart J. Hartman, Raymond P. Dallago
  • Polythiols and use as epoxy resin curing agents
    Patent number: 4879414
    Abstract: Polythiols prepared by the reaction of hydrogen sulfide or organic dithiols with polyglycidyl substituted amines have been found to be outstanding curing agents for epoxy resins. Epoxy resins cured with these polythiols are characterized by not only improved gel times, but also improved cure rates, better heat resistance and greater resistance to absorption of water.A useful polythiol is the reaction product of N,N,N',N'-tetraglycidyl-m-xylylenediamine with hydrogen sulfide.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: November 7, 1989
    Assignee: Henkel Corporation
    Inventors: Grannis S. Johnson, Reuben H. Grinstein, Stuart J. Hartman, Raymond P. Dallago
  • Urethane additive to a standard epoxy resin to improve adhesion to vinyl materials
    Patent number: 4000214
    Abstract: Curable resin compositions comprising a blend of an epoxy resin, a polyurethane resin which comprises the reaction product of (A) a polyisocyanate, (B) a polyester resin and (C) a dihydric alcohol, and a standard epoxy resin curing agent. These resinous compositions, when cured, retain excellent resilience and exhibit outstanding adhesion. They are especially useful for bonding vinyl materials.
    Type: Grant
    Filed: May 8, 1975
    Date of Patent: December 28, 1976
    Assignee: Reichhold Chemicals, Inc.
    Inventors: Dorey Lum, Stuart J. Hartman, Robert E. Schaefer