Granted Patent
Utility
US 5,314,795 · App. 07/993,650
Thermal-dye-bleach construction comprising a polymethine dye and a thermal carbanion-generating agent
Inventors:
Randall H. Helland, Sylvia A. Farnum, Mark P. Kirk, Jonathan P. Kitchin, Roger A. Mader, Mark B. Mizen, Richard A. Newmark, William D. Ramsden, Kumars Sakizadeh, Terence D. Spawn, Dian E. Stevenson, George V. D. Tiers
Patented Case
View Patent ↗
Granted: May 24, 1994
Filed: Dec 21, 1992
Inventors
Randall H. Helland
Sylvia A. Farnum
Mark P. Kirk
Jonathan P. Kitchin
Roger A. Mader
Mark B. Mizen
Richard A. Newmark
William D. Ramsden
Kumars Sakizadeh
Terence D. Spawn
Dian E. Stevenson
George V. D. Tiers
Assignee (at issue)
Minnesota Mining and Manufacturing 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.