Granted Patent
Utility
US 6,420,445 · App. 09/487,087
Polyurethane and polyurethane/urea heat-cured and moisture-cured elastomers with improved physical properties
Inventors:
Nigel Barksby, Bruce D. Lawrey, Susan M. Clift
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Jan 19, 2000
Inventors
Nigel Barksby
Bruce D. Lawrey
Susan M. Clift
Assignee (at issue)
Bayer Antwerpen
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.