US2764490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractive material
Assignee: NL Industries Inc
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Filing: 1953-02-02
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Granted: 1956-09-25
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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 16:39
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/04; C30B11/08; C30B11/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
93 words
METHOD FOR THE PREPARATION OF A MONOCRYSTALLINE MASS OF STRONTIUM TITANATE IN THE FORM OF A BOULE WHICH COMPRISES PERIODICALLY INTRODUCING POWDERED STRONTIUM TITANATE INTO A STREAM OF OXYGEN, SURROUNDING SAID STREAM OF OXYGEN WITH A STREAM OF HYDROGEN AND FORMING A FLAME HAVING A CENTRAL OXYGEN CONE, SAID FLAME PRODUCING A TEMPERATURE FROM ABOUT 2080* C. TO ABOUT 2150* C. IN SAID OXYGEN CONE, MELTING SAID POWDERED STRONTIUM TITANATE AT SAID TEMPERATURE AND CRYSTALLIZING THE MOLTEN STRONTIUM TITANATE ADJACENT THE OXYGEN CONE AND RECOVERING SAID CRYSTALLIZED STRONTIUM TITANATE AS A MONOCRYSTALLINE MASS.
Claim 2
Dependent Claim
93 words
METHOD FOR THE PREPARATION OF A MONOCRYSTALLINE MASS OF STRONTIUM TITANATE IN THE FORM OF A BOULE WHICH COMPRISES PERIODICALLY INTRODUCING POWDERED STRONTIUM TITANATE INTO A STREAM OF OXYGEN, SURROUNDING SAID STREAM OF OXYGEN WITH A STREAM OF HYDROGEN AND FORMING A FLAME HAVING A CENTRAL OXYGEN CONE, SAID FLAME PRODUCING A TEMPERATURE FROM ABOUT 2080* C. TO ABOUT 2150* C. IN SAID OXYGEN CONE, MELTING SAID POWDERED STRONTIUM TITANATE AT SAID TEMPERATURE AND CRYSTALLIZING THE MOLTEN STRONTIUM TITANATE ADJACENT THE OXYGEN CONE AND RECOVERING SAID CRYSTALLIZED STRONTIUM TITANATE AS A MONOCRYSTALLINE MASS.
Claim 3
Dependent Claim
57 words
HIGHLY REFRACTIVE GLASS-LIKE MATERIAL CONSISTING ESSENTIALLY OF A MONOCRYSTALLINE MASS OF STRONTIUM TITANATE AND AN AMOUNT FROM ABOUT 0.005% TO ABOUT 3.0% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM OXIDE, TUNGSTEN OXIDE AND URANIUM OXIDE, SAID MONOCRYSTALLINE MASS FORMED BY CRYSTALLIZING SAID MASS AS A BOULE FROM A MELT OF SAID MIXTURE.
Claim 4
Dependent Claim
57 words
HIGHLY REFRACTIVE GLASS-LIKE MATERIAL CONSISTING ESSENTIALLY OF A MONOCRYSTALLINE MASS OF STRONTIUM TITANATE AND AN AMOUNT FROM ABOUT 0.005% TO ABOUT 3.0% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM OXIDE, TUNGSTEN OXIDE AND URANIUM OXIDE, SAID MONOCRYSTALLINE MASS FORMED BY CRYSTALLIZING SAID MASS AS A BOULE FROM A MELT OF SAID MIXTURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |