David A Bird

US Patent:

8298972, Oct 30, 2012

Filed:

Jul 14, 2011

Appl. No.:

13/067997

Inventors:

Kevin R. Fulton - Howell MI, US
Abraham W. Michaelis - Haifa, IL
Mario Resch - Ramat Ishay, IL
David Bird - Superior Township MI, US
Richard Hulme - Rochester Hills MI, US
Scott V. Thomsen - South Lyon MI, US

Assignee:

Guardian Industries Corp. - Auburn Hills MI
Phoenicia America-Israel (Flat Glass) Ltd. - Nazaret-llit

International Classification:

C03C 6/02
C03C 3/087

US Classification:

501 27, 501 70, 501 71

Abstract:

This invention relates to a high transmission low iron glass that includes boron oxide. The boron oxide, added to this low iron glass, has the effect of improving glass refining, homogeneity and quality (lower seed count) through its flux action and improves glass optical parameters of green and clear glass through the change in refractive index and surface tension. Boron oxide lends to broader and weaker absorption band of such transition element(s) as iron which additionally improves the transmittance of low iron clear glass in certain example embodiments of this invention. In certain example embodiments, the addition of boron oxide in certain quantities in advantageous in that it improves the chemical durability of the glass by decreasing the USPX (or USPXIII) value of the glass via suppression of the silica, sodium ions in the glass structure.

US Patent:

20100255980, Oct 7, 2010

Filed:

Apr 3, 2009

Appl. No.:

12/385318

Inventors:

Kevin R. Fulton - Howell MI, US
Abraham W. Michaelis - Haifa, IL
Mario Resch - Ramat Ishay, IL
David Bird - Superior Township MI, US
Richard Hulme - Rochester Hills MI, US
Scott V. Thomsen - South Lyon MI, US

Assignee:

Guardian Industires Corp. - Auburn Hills MI
Phoenicia America-Israel (Flat Glass) Ltd. - Nazaret-Ilit

International Classification:

C03C 3/089
C03C 3/095

US Classification:

501 65, 501 64

Abstract:

This invention relates to a high transmission low iron glass that includes boron oxide. The boron oxide, added to this low iron glass, has the effect of improving glass refining, homogeneity and quality (lower seed count) through its flux action and improves glass optical parameters of green and clear glass through the change in refractive index and surface tension. Boron oxide lends to broader and weaker absorption band of such transition element(s) as iron which additionally improves the transmittance of low iron clear glass in certain example embodiments of this invention. In certain example embodiments, the addition of boron oxide in certain quantities in advantageous in that it improves the chemical durability of the glass by decreasing the USPX (or USPXIII) value of the glass via suppression of the silica, sodium ions in the glass structure.