Patent US3057703A successfully refreshed from Google Patents.
US3057703A
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Crystal growing furnace
Assignee: Knapic Electro-Physics Inc
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Filing: 1959-10-22
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Granted: 1962-10-09
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Expires: 1979-10-22
Abstract
No abstract record available.
Inventors
- 👤 Dean D Knapic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:10
CPC Classifications
C; C30; C30B; C30B15/00; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A METHOD OF GROWING CRYSTALS FROM A MELT HAVING THE STEPS COMPRISING; SEALING THE MELT FROM ATMOSPHERE INTRODUCING A SELECTED GAS IN THE AREA AROUND THE MELT, SURROUNDING SAID MELT WITH A GAS, WITHDRAWING SAID GAS FROM A POINT ADJACENT THE TOP EDGE OF THE MELT, FILTERING SAID GAS WHILE HOT, AND FORCING SAID FILTERED GAS OVER THE TOP EDGE OF SAID MELT WHILE AT AN ELEVATED TEMPERATURE.
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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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |