US2826666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in apparatus for growing single crystals
Assignee: Tung Sol Electric Inc
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Filing: 1954-02-15
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Granted: 1958-03-11
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Expires: 1974-02-15
Abstract
No abstract record available.
Inventors
- 👤 John R Cater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
C; C30; C30B; C30B13/00; C30B13/26; Y; Y10; Y10S; Y10S117/00; Y10S117/90; Y10S65/00; Y10S65/04; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |