Granted Patent
Utility
US 4,282,146 · App. 05/962,223
Preparation of 1,2,4,5-tetrahydro-7-alkoxy-(and 7,8-dialkoxy)-3H,3-benzazepines and 3-substituted derivatives thereof from the corresponding phenethylamines
Inventors:
Thomas A. Davidson, Ronald C. Griffith
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Nov 20, 1978
Inventors
Thomas A. Davidson
Ronald C. Griffith
Assignee (at issue)
Pennwalt 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.