US2935386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing small semiconductor silicon crystals
Assignee: Clevite Corp
•
Filing: 1956-01-03
•
Granted: 1960-05-03
•
Expires: 1976-01-03
Abstract
No abstract record available.
Inventors
- 👤 Milton L Selker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
C; C30; C30B; C30B11/00; C30B11/002; Y; Y10; Y10S; Y10S117/00; Y10S117/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A METHOD OF PRODUCING SEMICONDUCTIVE SILICON WHICH COMPRISES THE STEPS OF: SUPPORTING SILICON IN CONTACT WITH CRYSTALLINE QUARTZ POWER, AND HEATING TO MOLTEN CONDITION AND THEREAFTER COOLING THE SILICON IN A NON-REACTIVE ATMOSPHERE WHILE THUS SUPPORTED IN CONTACT WITH THE CRYSTALLINE QUARTZ POWDER.
Claim 2
Independent Claim
43 words
A METHOD OF PRODUCING SEMICONDUCTIVE SILICON WHICH COMPRISES THE STEPS OF: SUPPORTING SILICON IN CONTACT WITH CRYSTALLINE QUARTZ POWER, AND HEATING TO MOLTEN CONDITION AND THEREAFTER COOLING THE SILICON IN A NON-REACTIVE ATMOSPHERE WHILE THUS SUPPORTED IN CONTACT WITH THE CRYSTALLINE QUARTZ POWDER.
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US2668262A
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US2723370A
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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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |