US3701636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal growing apparatus
Assignee: Saint Gobain Ceramics and Plastics Inc
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Filing: 1970-09-23
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Granted: 1972-10-31
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Expires: 1990-09-23
Abstract
Abstract APPARATUS FOR USE IN GROWING LARGE SIZE MONOCRYSTALLINE PLATES OF MATERIALS SUCH AS ALUMINA. THE APPARATUS CONSISTS OF A FORMING MEMBER FOR WHICH THE PLATE IS GROWN AND HEAT SUSCEPTOR MEANS SHAPED SO AS TO PROVIDE A TEMPERATURE PATTERN SYMMETRICAL WITH THE EDGE CONFIGURATION OF THE PLATE.
Inventors
- 👤 Harold E La Belle Jr
- 👤 William T Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:44
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/34; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1016; Y10T117/1024; Y10T117/1032; Y10T117/1036; Y10T117/1044; Y10T117/1068
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |