Granted Patent
Utility
US 4,634,622 · App. 06/776,252
Lightweight asphalt based building materials and process for making same
Inventors:
Kenneth L. Jenkins, Stanley C. Suhaka, Rick Lee Dolin, Allan R. LaRoche, Robert E. Hodgson, Neil R. Such, Douglas D. Smith, Frank Newton, Richard N. Cunningham
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Sep 16, 1985
Inventors
Kenneth L. Jenkins
Stanley C. Suhaka
Rick Lee Dolin
Allan R. LaRoche
Robert E. Hodgson
Neil R. Such
Douglas D. Smith
Frank Newton
Richard N. Cunningham
Assignee (at issue)
Manville Corporation
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.