US3558284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal growing apparatus
Assignee: American Science and Engineering Inc
•
Filing: 1967-05-05
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Granted: 1971-01-26
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Expires: 1987-05-05
Abstract
Abstract A CRYSTAL GROWING APPARATUS COMPRISING A REFRACTORY FURNACE IN WHICH ONE END OF A REFRACTORY ROD IS HELD AND WITHIN WHICH THERE IS A NOZZLE BY MEANS OF WHICH MOLTEN CRYST AL FORMING MATERIAL IS DEPOSITED ON THE ROD. THE CRYSTAL FORMING MATERIAL IS IN THE FORM OF POWER AND IS LIQUEFIED IN AN OXYGEN-HYDROGEN FLAME AT THE END OF THE NOZZLE. AS THE CRYSTAL GROWS AT THE END OF THE ROD THE LATTER RETRACTED.
Inventors
- 👤 Elbridge B Wallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:50
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/04; C30B11/08; C30B11/10; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1028
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |