4-[4'-piperodinyl or 3'-pirrolidinyl] substituted imidazoles as H.sub.3 -receptor antagonists and therapeutic uses thereof

Granted: Jun 17, 1997 Filed: Sep 30, 1994

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.