Chemically durable, high index, low density glasses

Details Chemically durable, high index, low density glasses Chemically durable, high index, low density glasses

1988-05-06

1989-06-13

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501903, C03C 3068, C03C 400

Patent

active

048393142

ABSTRACT:
This invention is directed to the production of glasses especially suitable for use as ophthalmic lenses which exhibit indices of refraction between about 1.699-1.703, Abbe numbers equal to or greater than 41.0, densities less than 3.25 g/cm.sup.3, and good resistance to attack by acids. The glasses are essentially free of Al.sub.2 O.sub.3 and consist essentially, in weight percent on the oxide basis, of:

REFERENCES:
patent: 4084978 (1978-04-01), Sagara
patent: 4390638 (1983-06-01), Mennemann et al.

Affiliated with

Also associated with

Rating

Chemically durable, high index, low density glasses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chemically durable, high index, low density glasses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemically durable, high index, low density glasses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1277537