Granted Patent
Utility
US 4,462,229 · App. 06/437,760
Closeable threadline guide for suppressing fluid flow
Inventors:
Andre Lafeber, Frank Wilson
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Oct 29, 1982
Inventors
Andre Lafeber
Frank Wilson
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.