BENZO[b]PYRYLIUM DYE SALTS

• US 3,694,462 A
• Filed: 03/02/1970
• Issued: 09/26/1972
• Est. Priority Date: 03/02/1970
• Status: Expired due to Term

• Current Assignee: Patrick J. Grisdale
• Original Assignee: Patrick J. Grisdale
• Inventors: Grisdale, Patrick J.
• Primary Examiner(s): Ford, John M.
• Application Number:
  US05/015,832
• Time in Patent Office: 939 Days
• Field of Search: 260/345.2
• US Class Current: 549/382
• CPC Class Codes: C07D 311/80 Dibenzopyrans; Hydrogenated dibenzopyrans
• CPC Class Codes: C07D 311/94 condensed with rings other than six-membered or with ring systems containing such rings

Abstract

A class of novel benzo( b) pyrylium dye salts having a partially saturated, bicyclic ring system fused thereto is described.

Claims

2. Benzocyclohept(5,4-b)-naphtho(1,2-e)pyrylium perchlorate.

3. 12H-indeno(3,2-b)naphtho-(1,2-e)pyrylium perchlorate.

4. 8-methoxy-10H-indeno-(2,3-e)benzo(b)pyrylium perchlorate.