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:
Apr. 18, 1995
Filed:
Jul. 28, 1992
Applicant:
Inventors:
James E McGrath, Blacksburg, VA (US);
Carrington D Smith, Blacksburg, VA (US);
Assignee:
The Center for Innovative Technology, Herndon, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ;
U.S. Cl.
CPC ...
156643 ; 1566591 ; 156904 ;
Abstract
Poly(arylene ether phosphine oxide)s provide hydrolytic, thermal and oxidative stability. These materials have T.sub.g s ranging from about 190.degree.-280.degree. C., and are more self-extinguishing than other engineering thermoplastics tested when burned due to the presence of phosphorus in a substantial amount of char. Moreover, phosphorus presence played a major role in resisting aggressive oxygen plasma environments by forming a highly oxidized, non-volatile phosphorus containing surface layer.