Granted Patent
Utility
US 4,945,146 · App. 07/124,338
Dispersion polymers processes for their preparation and their use
Inventors:
Wolfgang Kapmeyer, Helmut Rinno
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Nov 18, 1987
Inventors
Wolfgang Kapmeyer
Helmut Rinno
Assignee (at issue)
Behringwerke Aktiengesellschaft
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.