Patent US3006776A successfully refreshed from Google Patents.
US3006776A
Expired / Lapsed
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Optical glass
Assignee: Schott AG
•
Filing: 1954-07-12
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Granted: 1961-10-31
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Expires: 1974-07-12
Abstract
No abstract record available.
Inventors
- 👤 Geffcken Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/068; C03C3/12; C03C3/14; C03C3/15; C03C3/155; C03C3/253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
OPTICAL GLASS WITH A HIGH REFRACTIVE INDEX HAVING THE FOLLOWING COMPOSITION IN WEILGHT PERCENT: B2O3 36.0 CAO 10.0 ZRO2 4.0 SIO2 10.0 LA2O3 34.0 ZNO 6.0
Claim 2
Dependent Claim
26 words
OPTICAL GLASS WITH A HIGH REFRACTIVE INDEX HAVING THE FOLLOWING COMPOSITION IN WEILGHT PERCENT: B2O3 36.0 CAO 10.0 ZRO2 4.0 SIO2 10.0 LA2O3 34.0 ZNO 6.0
References Cited (Backward Citations)
US2584975A
Cited
US2678281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |