Triphenazinoxazines

• US 5,290,930 A
• Filed: 02/01/1993
• Issued: 03/01/1994
• Est. Priority Date: 03/31/1986
• Status: Expired due to Fees

• Current Assignee: Gentex Corporation
• Original Assignee: Gentex Corporation
• Inventors: Byker, Harlan J.
• Primary Examiner(s): TUCKER, PHILIP C
• Application Number:
  US08/013,162
• Time in Patent Office: 393 Days
• Field of Search: 252/583, 252/586, 252/600, 359/265, 359/272, 359/275, 544/14, 544/58.6, 544/75, 544/99, 544/102
• US Class Current: 544/99
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: C07D 498/04 Ortho-condensed systems
• CPC Class Codes: C09K 9/02 Organic tenebrescent materials
• CPC Class Codes: G01R 13/40 using modulation of a light beam otherwise than by mechanical displacement, e.g. by Kerr effect visual indication of correct tuning H03J3/14
• CPC Class Codes: G02F 1/1503 caused by oxidation-reduction reactions in organic liquid solutions, e.g. viologen solutions
• CPC Class Codes: G02F 1/1533 structural features not otherwise provided for
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 2001/1502 complementary cell
• CPC Class Codes: G02F 2001/15145 the electrochromic layer comprises a mixture of anodic and cathodic compounds

Abstract

The present invention provides certain triphenzainoxazines.

Claims

1. A compound of the formula ##STR13## wherein R₇₇, R₇₈ and R₇₉ are the same or different and are each selected from the group consisting of alkyl of 1-6 carbon atoms.

2. The compound according to claim 1 wherein R₇₇, R₇₈, and R₇₉ are methyl.