Granted Patent
Utility
US 4,795,712 · App. 07/037,303
Calcium complexing dyes and their use in analytical compositions, elements and methods
Inventors:
John L. Toner, Bruce J. Murray, Bruce E. Babb, Michael W. Sundberg
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Apr 10, 1987
Inventors
John L. Toner
Bruce J. Murray
Bruce E. Babb
Michael W. Sundberg
Assignee (at issue)
EASTMAN KODAK COMPANY
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.