Granted Patent
Utility
US 4,881,682 · App. 07/203,401
Vapor phase soldering with perfluorinated butyl derivative compounds
Inventors:
Frank K. Schweighardt, Webb I. Bailey
Patented Case
View Patent ↗
Granted: Nov 21, 1989
Filed: Jun 6, 1988
Inventors
Frank K. Schweighardt
Webb I. Bailey
Assignee (at issue)
Air Products and Chemicals, Inc.
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.