Granted Patent
Utility
US 6,832,418 · App. 10/691,040
Nonwoven secondary carpet backing
Inventors:
Herbert Hartgrove, Cynthia McNaull, Russell Tindall
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Oct 22, 2003
Inventors
Herbert Hartgrove
Cynthia McNaull
Russell Tindall
Assignee (at issue)
Polytec GmbH
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.