US2606841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical glass
Assignee: Corning Glass Works
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Filing: 1949-05-31
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Granted: 1952-08-12
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Expires: 1969-05-31
Abstract
No abstract record available.
Inventors
- 👤 William H Armistead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:32
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/076; C03C3/089; Y; Y10; Y10S; Y10S501/00; Y10S501/90; Y10S501/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A TRANSPARENT OPTICAL GLASS WHICH COMPRISES ESSENTIALLY OF 3% TO 70% BAO, 3% TO 75% CDO, AND 12% TO 50% OF A MIXTURE OF SIO2 AND B2O3, THE TOTAL BAO, CDO, SIO2 AND B203 BEING AT LEAST 70%, THE TOTAL BAO AND CDO BEING AT LEAST 40%, AND THE REMAINDER OF THE COMPOSITION COMPRISING COMPATIBLE OXIDES, THE REFRACTIVE INDEX (ND) BEING AT LEAST 1.60 AND THE DISPERSIVE INDEX (V) BEING GREATER THAN BOTH V=202-100ND AND V=11,1.4-46.6ND.
Claim 2
Dependent Claim
76 words
A TRANSPARENT OPTICAL GLASS WHICH COMPRISES ESSENTIALLY OF 3% TO 70% BAO, 3% TO 75% CDO, AND 12% TO 50% OF A MIXTURE OF SIO2 AND B2O3, THE TOTAL BAO, CDO, SIO2 AND B203 BEING AT LEAST 70%, THE TOTAL BAO AND CDO BEING AT LEAST 40%, AND THE REMAINDER OF THE COMPOSITION COMPRISING COMPATIBLE OXIDES, THE REFRACTIVE INDEX (ND) BEING AT LEAST 1.60 AND THE DISPERSIVE INDEX (V) BEING GREATER THAN BOTH V=202-100ND AND V=11,1.4-46.6ND.
References Cited (Backward Citations)
US2477649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |