US2936216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making monocrystalline calcium titanate
Assignee: NL Industries Inc
•
Filing: 1958-02-24
•
Granted: 1960-05-10
•
Expires: 1978-02-24
Abstract
No abstract record available.
Inventors
- 👤 Merker Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:18
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/04; C30B11/08; C30B11/10; Y; Y10; Y10S; Y10S117/00; Y10S117/906; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1028
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
METHOD FOR THE PRODUCTION OF SUBSTANTIALLY WHITE MONOCYSTALLINE CALCIUM TITANATE BOULE WHICH COMPRISES PERIODICALLY INTRODUCING NOWDERED CALCIUM TITANATE INTO A STEAM OF OXYGEN, SURROUNDING SAID STEAM OF OXYGEN WITH A STEAM OF HYDROGEN AND FORMING AN OXYHYDROGEN FLAME HASVING A CENTRAL OXYGEN CONE, MELTING THE POWDERED CALCIUM TITANATE IN SAID OXYGYDROGEN FLAME, CRYSTALLIZING THE MOLTEN MATERIAL ADJACENT THE END OF THE OXYGEN CONE TO FORM A MONOCRYSTALLINE BOULE, MAINTAINING THE SAID FLAME ABOUT THE BOULE, AND WITHOUT ALLOWING THE BOULE TO COOL BELOW 1500*C. HEAT TREATING THE BOULE BY SUBJECTING SAID BULE TO AN OXIDIZING TREATMENT AT A TEMPERATURE OF AT LEAST 1650*C. FOR A PERIOD OF AT LEAST 12 HOURS TO ANNEAL AND TO PRECLUDE TWINNING.
Claim 2
Dependent Claim
117 words
METHOD FOR THE PRODUCTION OF SUBSTANTIALLY WHITE MONOCYSTALLINE CALCIUM TITANATE BOULE WHICH COMPRISES PERIODICALLY INTRODUCING NOWDERED CALCIUM TITANATE INTO A STEAM OF OXYGEN, SURROUNDING SAID STEAM OF OXYGEN WITH A STEAM OF HYDROGEN AND FORMING AN OXYHYDROGEN FLAME HASVING A CENTRAL OXYGEN CONE, MELTING THE POWDERED CALCIUM TITANATE IN SAID OXYGYDROGEN FLAME, CRYSTALLIZING THE MOLTEN MATERIAL ADJACENT THE END OF THE OXYGEN CONE TO FORM A MONOCRYSTALLINE BOULE, MAINTAINING THE SAID FLAME ABOUT THE BOULE, AND WITHOUT ALLOWING THE BOULE TO COOL BELOW 1500*C. HEAT TREATING THE BOULE BY SUBJECTING SAID BULE TO AN OXIDIZING TREATMENT AT A TEMPERATURE OF AT LEAST 1650*C. FOR A PERIOD OF AT LEAST 12 HOURS TO ANNEAL AND TO PRECLUDE TWINNING.
References Cited (Backward Citations)
US2507253A
Cited
US2764490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |