Granted Patent
Utility
US 5,306,813 · App. 08/008,084
Reactive dyes having a bulky linker group
Inventors:
Andrew H. M. Renfrew, John A. Taylor
Patented Case
View Patent ↗
Granted: Apr 26, 1994
Filed: Jan 22, 1993
Inventors
Andrew H. M. Renfrew
John A. Taylor
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.