The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2000
Filed:
Sep. 15, 1998
James John Krutak, Sr, Kingsport, TN (US);
Thomas Vernon McCray, Kingsport, TN (US);
Edwin Taylor Boyd, Kingsport, TN (US);
Fred Dewey Barlow, Jr, Kingsport, TN (US);
Melvin Glenn Mitchell, Kingsport, TN (US);
Lee Reynolds Partin, Kingsport, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
A cellulosic ester has associated with the ester at least one near infrared fluorophore. A method for incorporating the near infred fluorophore into the cellulosic ester is also provided. In the method, the near infrared fluorophore is dissolved in a strong acid and precipitated to form an acid paste. The paste is then added to an activated cellulose, such as a hydrolyzed cellulose acetate, in the presence of at least one acid and acid anhydride. Advantageously, such marked cellulosic materials can be solvent spun into staple fibers which may be further utilized in known materials, webs and articles.