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Patent US3576608A successfully refreshed from Google Patents.
US3576608A
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Hydrothermal synthesis of quartz utilizing x-cut seed plate elongated on the crystallographic z axis
Assignee: PR HOFFMAN MATERIALS PROCESSING Corp A CORP OF DE
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Filing: 1967-10-16
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Granted: 1971-04-27
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Expires: 1987-10-16
Abstract
Abstract A QUARTZ ROCK IS GROWN BY A HYDROTHERMAL SYNTHESIS PROCESS ON A SEED PLATE OVER 2 INCHES LONG ON THE CRYSTALLOGRAPHIC Z AXIS WITH ITS WIDTH ON THE Y AXIS AND ITS THICKNESS ON THE X AXIS. THE SEEDS ARE MOUNTED IN PAIRS IN AN AUTOCLAVE WITH THE -X FACES OF THE SEED PLATES ABUTTING DURING THE GROWTH CYCLE. ELONGATED BAR-SHAPED BLANKS HAVING THEIR LENGTH IN THE Z AXIS EQUAL TO OR GREATER THAN THE LENGTH OF THE SEED ARE SLICED FROM THE GROWN SEED BY CUTTING PARALLEL TO THE Z AXIS.
Inventors
- 👤 David W Gehres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:50
CPC Classifications
C; C30; C30B; C30B7/00; C30B29/00; C30B29/10; C30B29/16; C30B29/18; Y; Y10; Y10S; Y10S117/00; Y10S117/901; Y10S117/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |