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• US 3,787,412 A
• Filed:
• Issued:
• Est. Priority Date: 03/14/1972
• Status: Expired due to Term

• Current Assignee: Appleton Papers Incorporated (Oldapco PDC Corp.)
• Original Assignee: Appleton Papers Incorporated (Oldapco PDC Corp.)
• Time in Patent Office: Days
• US Class Current: 546/18
• CPC Class Codes: B41M 5/145 with a lactone or lactam ring
• CPC Class Codes: B41M 5/1455 characterised by fluoran compounds
• CPC Class Codes: C07D 491/10 Spiro-condensed systems

Abstract

WHEREIN EACH R IS AN ALKYL RADICAL HAING 1 TO 5 CARBON ATOMS AND EACH R'"'"''"'"' IS HYDROGEN, AN ALKYL RADICAL HAVING 1 TO 5 CARBON ATOMS, AN ALKOXY RADICAL HAING 1 TO 5 CARBON ATOMS, A DIALKYLAMINO RADICAL WHEREIN EACH ALKYL RADICAL HAS 1 TO 5 CARBON ATOMS RADICAL, AN AMINO, A NITRO RADICAL OR A HALOGEN. THESE COMPOUNDS ARE USED IN PRESSURE TIVE RECORD MATERIAL AND IN MARK-FORMINE MANIFOLD SYSTEMS.

1,9'"'"''"'"'-ACRIDAN)

5-((R-)2-N-),10'"'"''"'"'-R,(R'"'"''"'"')2,(R'"'"''"'"')2-SPIRO(PHTHALAN-

1,9'"'"''"'"'-ACRIDAN) OR

3-(O=),5-((R-)2-N-),10'"'"''"'"'-R ,(R'"'"''"'"')2,(R'"'"''"'"')2-SPIRO(PHTHALAN-

COLORLESS, BUT COLORABLE ACRIDAN COMPOUNDS ARE DISCLOSED, WHICH ARE REPRESENTED BY THE FORMULA:

Claims