US2723915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monocrystalline refractive composition and its method of preparation
Assignee: NL Industries Inc
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Filing: 1953-02-02
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Granted: 1955-11-15
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Expires: 1973-02-02
Abstract
No abstract record available.
Inventors
- 👤 Merker Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:02
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/51; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C30; C30B; C30B29/00; C30B29/10; C30B29/16; C30B29/22; C30B29/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
HIGHLY REFRACTIVE GLASS-LIKE MONOCRYSTALLINE COMPOSITION CONSISTING ESSENTIALLY OF STRONTIUM TITANATE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDIC COMPOUND OF IRON, OXIDIC COMPOUND OF VANADIUM, OXIDIC COMPOUND OF CHROMIUM, OXIDIC COMPOUND OF MANGANESE, OXIDIC COMPOUND OF NICKEL, AND OXIDIC COMPOUND OF COBALT THE AMOUNT OF OXIDIC COMPOUND EMPLOYED BEING FROM ABOUT 0.005% TO ABOUT 3.0%, BY WEIGHT, FOR IRON MANGANESE, NICKEL AND COBALT, AND BEING FROM ABOUT 0.001% TO ABOUT 3.0%, BY WEIGHT, FOR CHRONIUM AND VANADIUM.
Claim 2
Dependent Claim
79 words
HIGHLY REFRACTIVE GLASS-LIKE MONOCRYSTALLINE COMPOSITION CONSISTING ESSENTIALLY OF STRONTIUM TITANATE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF OXIDIC COMPOUND OF IRON, OXIDIC COMPOUND OF VANADIUM, OXIDIC COMPOUND OF CHROMIUM, OXIDIC COMPOUND OF MANGANESE, OXIDIC COMPOUND OF NICKEL, AND OXIDIC COMPOUND OF COBALT THE AMOUNT OF OXIDIC COMPOUND EMPLOYED BEING FROM ABOUT 0.005% TO ABOUT 3.0%, BY WEIGHT, FOR IRON MANGANESE, NICKEL AND COBALT, AND BEING FROM ABOUT 0.001% TO ABOUT 3.0%, BY WEIGHT, FOR CHRONIUM AND VANADIUM.
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) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |