Color salts of fluoren-9-ols as infrared absorbers

• US 3,000,833 A
• Filed: 01/26/1959
• Issued: 09/19/1961
• Est. Priority Date: 01/26/1959
• Status: Expired due to Term

• Current Assignee: Peter V. Susi, Ralph A. Coleman
• Original Assignee: Peter V. Susi, Ralph A. Coleman
• Inventors: Coleman, Ralph A., Susi, Peter V.
• Application Number:
  US03/788,738
• Time in Patent Office: 967 Days
• US Class Current: 252/587
• CPC Class Codes: C03C 17/28 with organic material C03C17/34, C03C17/44 take precedence
• CPC Class Codes: C07C 2603/18 Fluorenes; Hydrogenated fluorenes
• CPC Class Codes: C08K 5/18 with aromatically bound amino groups
• CPC Class Codes: C09B 11/04 derived from triarylmethanes , i.e. central C-atom is substituted by amino, cyano, alkyl
• CPC Class Codes: C09B 11/22 containing OH groups bound to an aryl nucleus and their ethers and esters
• CPC Class Codes: C09K 5/14 Solid materials, e.g. powdery or granular
• CPC Class Codes: G02B 5/223 containing organic substances, e.g. dyes, inks or pigments

Claims

2. A METHOD OF PROTECTING MATERIALS FROM INCIDENT INFRARED RAYS WHICH COMPRISES INTERPOSING BETWEEN THE SOURCE OF SAID INFRARED RAYS AND THE MATERIAL TO BE PROTECTED, A BARRIER COMTAINING AT LEAST 0.005 GRAM PER SQUARE FOOT OF BARRIER OF SALT OF A 9-PHENYLFLUOREN-9-OL OF THE STRUCTURE: