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US3043702A
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Optical glass
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1959-09-17
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Granted: 1962-07-10
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Expires: 1979-09-17
Abstract
No abstract record available.
Inventors
- 👤 Bromer Heinz
- 👤 Meinert Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:06
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/12; C03C3/16; C03C3/19; C03C3/14; C03C3/145; C03C3/15; C03C3/155; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
OPTICAL GLASS HAVING A HIGH REFACTORY POWER, MEDIUM DISPERSION WITH AN ABNORMAL PARTIAL DISPERSION AND EXCELLENT CHEMICAL STABILITY CONSISTING ESSENTIALLY OF THE HEAT REACTION PRODUCT OF, IN PERCENT BY WEIGHT OF THE GLASS, 45-70% OF A LEAD SALT OF THE GROUP CONSISTING OF LEAD BORATE AND LEAD PHOSPHATE; 10-30% OF BORIC ACID; 8-15% OF ALUMINUM OXIDE; ABOUT 7.4-23.3% OF A MEMBER OF THE GROUP CONSISTING OF 0-15% TANTALUM OXIDE, 0-15% ZINC OXIDE, 0-15% CADMIUM OXIDE, 0-5% ZIRCONIUM OXIDE, 0-15% OF AN ALKALINE EARTH, 0-7% OF A RARE OXIDE, AND MIXTURES THEREOF
Claim 2
Dependent Claim
91 words
OPTICAL GLASS HAVING A HIGH REFACTORY POWER, MEDIUM DISPERSION WITH AN ABNORMAL PARTIAL DISPERSION AND EXCELLENT CHEMICAL STABILITY CONSISTING ESSENTIALLY OF THE HEAT REACTION PRODUCT OF, IN PERCENT BY WEIGHT OF THE GLASS, 45-70% OF A LEAD SALT OF THE GROUP CONSISTING OF LEAD BORATE AND LEAD PHOSPHATE; 10-30% OF BORIC ACID; 8-15% OF ALUMINUM OXIDE; ABOUT 7.4-23.3% OF A MEMBER OF THE GROUP CONSISTING OF 0-15% TANTALUM OXIDE, 0-15% ZINC OXIDE, 0-15% CADMIUM OXIDE, 0-5% ZIRCONIUM OXIDE, 0-15% OF AN ALKALINE EARTH, 0-7% OF A RARE OXIDE, AND MIXTURES THEREOF
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |