Granted Patent
Utility
US 6,044,867 · App. 09/342,705
Method and apparatus for fabricating a flexible lining with flexible collar for lining lateral pipelines
Inventors:
John Tweedie, Philip M. Smith, Jeff P. Wells, Kevin P. Murray
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Jun 29, 1999
Inventors
John Tweedie
Philip M. Smith
Jeff P. Wells
Kevin P. Murray
Assignee (at issue)
Insituform (Netherlands) B.V.
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.