Patents by Inventor Dennis Keith Fisher

Dennis Keith Fisher 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).

  • Lap edge roofing sealant
    Patent number: 6642296
    Abstract: A lap edge sealant composition is provided for adhering together overlapping sheets of roofing material which includes a rubbery polymer such as EPDM, a thermoplastic rubber, a tackifier, and a solvent, where the solvent is selected from aliphatic hydrocarbons, para-chlorobenzotrifluoride, or blends thereof. The lap edge sealant has a high solids content of about 65 to 90%, a volatile organic compound (VOC) content of less than about 250 g/l, and exhibits no more than about 35% shrinkage upon curing.
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: November 4, 2003
    Assignee: Adco Products, Inc.
    Inventor: Dennis Keith Fisher
  • Lap edge roofing sealant
    Publication number: 20020013402
    Abstract: A lap edge sealant composition is provided for adhering together overlapping sheets of roofing material which includes a rubbery polymer such as EPDM, a thermoplastic rubber, a tackifier, and a solvent, where the solvent is selected from aliphatic hydrocarbons, para-chlorobenzotrifluoride, or blends thereof. The lap edge sealant has a high solids content of about 65 to 90%, a volatile organic compound (VOC) content of less than about 250 g/l, and exhibits no more than about 35% shrinkage upon curing.
    Type: Application
    Filed: August 7, 2001
    Publication date: January 31, 2002
    Inventor: Dennis Keith Fisher
  • Adhesive composition for providing water-tight joints in single-ply roofing membranes
    Patent number: 6297324
    Abstract: A cured adhesive tape composition for adhering together roofing materials such as synthetic EPDM rubber and which provides long term water tightness is provided. The adhesive composition includes a) a rubbery polymer comprising a blend of (i) from about 12% or less by weight of the total composition of an ethylene-propylene-diene terpolymer, (ii) a halogenated butyl rubber or a halogenated copolymer of p-methylstyrene and isobutylene, (iii) polyisobutylene, and (iv) a butyl terpolymer, and b) a compatible tackifier, and c) an accelerator/cure package for the rubbery polymer. The cured composition exhibits a peel strength of at least 1000 grams/cm at room temperature, at least 500 grams/cm at 70° C., and supports a static load of at least 300 grams at 70° C.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: October 2, 2001
    Assignee: Adco Products, Inc.
    Inventors: Brian Jonathon Briddell, Dennis Keith Fisher, James Fredrick Wood
  • Lap edge roofing sealant
    Patent number: 6291571
    Abstract: A lap edge sealant composition is provided for adhering together overlapping sheets of roofing material which includes a rubbery polymer such as EPDM, a thermoplastic rubber, a tackifier, and a solvent, where the solvent is selected from aliphatic hydrocarbons, para-chlorobenzotrifluoride, or blends thereof. The lap edge sealant has a high solids content of about 65 to 90%, a volatile organic compound (VOC) content of less than about 250 g/l, and exhibits no more than about 35% shrinkage upon curing.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: September 18, 2001
    Assignee: Adco Products, Inc.
    Inventor: Dennis Keith Fisher