Glass compositions, glass fibers, and methods of inhibiting...

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Reexamination Certificate

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C501S035000, C501S064000

Reexamination Certificate

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07449419

ABSTRACT:
Embodiments of the present invention relate generally to fiberizable glass compositions comprising boron oxide at least one rare earth oxide in a molar ratio of rare earth oxide to boron oxide ranging from 0.01 to 0.33. Other embodiments of the present invention relate to methods of inhibiting boron volatization from glass compositions comprising boron oxide by adding a rare earth oxide to the glass composition before melting the glass compositions. Still other embodiments of the present invention relate to glass fibers formed from the fiberizable glass compositions of the present invention, and polymeric composites and printed circuit boards made therefrom.

REFERENCES:
patent: 4882302 (1989-11-01), Horiuchi et al.
patent: 5332699 (1994-07-01), Olds et al.
patent: 5714421 (1998-02-01), Olds et al.
patent: 5910461 (1999-06-01), Gasca et al.
patent: 5962354 (1999-10-01), Fyles et al.
patent: 6686304 (2004-02-01), Wallenberger
patent: 6962886 (2005-11-01), Wallengerger
patent: 2003/0207748 (2003-11-01), Wallenberger
patent: 1531287 (1976-05-01), None
patent: 63225552 (1988-09-01), None
patent: 06275618 (1994-10-01), None
Derwent Abstract 1988-304828, English language abstract of JP 63-225552 A.
Database WPI, Section Ch, Week 198843, Derwent Publications Ltd., London, GB, Class A60, AN 1988-304828, XP002347499 & JP 63 225552 A (Nitto Boseki Co Ltd), Sep. 20, 1988 abstract.

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