Lead and arsenic free, solarization resistant glass

Details Lead and arsenic free, solarization resistant glass Lead and arsenic free, solarization resistant glass

1995-03-31

1996-06-18

Patel, Nimeshkumar D.

Electric lamp and discharge devices

With gas or vapor

Envelope composition

313112, 501 55, 501 64, 501 69, 501 70, H01J 504, H01J 6130, C03L 304

Patent

active

055281079

ABSTRACT:
An electric arc discharge lamp having an arc discharge light source which emits both visible light radiation and UV radiation enclosed within an anti-solarization borosilicate glass envelope which is lead and arsenic free and having a transmission of greater than 90% at a wave length of 425 nm and a transmission of not more than 40% of said UV radiation at 320 nm; 8% of said UV radiation at 300 nm; and 0.5% of said UV radiation at 290 nm; said borosilicate glass comprising, in weight percent: from about 3.89% Na.sub.2 O; about 1.5% K.sub.2 O; about 0.15% Li.sub.2 O; about 17% B.sub.2 O.sub.3 ; about 1.4% Al.sub.2 O.sub.3 ; about 0.6% CaO; about 0.35% MgO; about 0.15% CeO.sub.2 ; from about 0.075% to about 0.30% SnO.sub.2 ; and the balance SiO.sub.2. Also, a glass having the above composition.

REFERENCES:
patent: 3451579 (1969-06-01), Bishop
patent: 4105826 (1978-08-01), Thomas
patent: 4459510 (1984-07-01), Joormann
patent: 4599319 (1986-07-01), Sack
patent: 4684847 (1987-08-01), Spierings et al.
patent: 5180695 (1993-01-01), Weiss et al.
patent: 5270608 (1993-12-01), Williamson et al.
patent: 5296294 (1994-03-01), Suzuki et al.
patent: 5308803 (1994-05-01), Clifford et al.

Affiliated with

Also associated with

Rating

Lead and arsenic free, solarization resistant glass does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lead and arsenic free, solarization resistant glass, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lead and arsenic free, solarization resistant glass will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-225037