Patent US3069244A successfully refreshed from Google Patents.
US3069244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicon
Assignee: International Standard Electric Corp
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Filing: 1960-07-05
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Granted: 1962-12-18
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Expires: 1980-07-05
Abstract
No abstract record available.
Inventors
- 👤 Sterling Henley Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:09
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/02; C30B29/06; C01; C01B; C01B33/00; C01B33/02; C01B33/021; C01B33/027; C01B33/029; C23; C23C; C23C16/00; C23C16/22; C30B25/00; C30B25/02; Y; Y10; Y10T; Y10T117/00; Y10T117/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2823982A
Cited
US2635946A
Cited
US2763581A
Cited
GB745698A
Cited
US2915367A
Cited
GB820192A
Cited
US2916359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |