Patent US3228753A successfully refreshed from Google Patents.
US3228753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orbital-spin crystal pulling
Assignee: Texas Instruments Inc
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Filing: 1962-07-27
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Granted: 1966-01-11
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Expires: 1982-07-27
Abstract
No abstract record available.
Inventors
- 👤 Louis L Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:23
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/30; C30B15/005; C30B15/32; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1064; Y10T117/1068; Y10T117/1072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A SYSTEM FOR PRODUCING GROWN SEMICONDUCTOR CRYTALS WHICH COMPRISES: (A) A GAS-TIGHT CHAMBER CONTAINING A QUANTITY OF INERT GAS, (B) A CRUCIBLE WITHIN SAID CHAMBER CONTAINIGN A SEMICONDUCTOR MELT, (C) A SEED CRYSTAL, (D) APPARATUS FOR HOLDING THE EXTREMITY OF SAID SEED CRYSTAL IN CONTACT WITH SAID MELT, (E) MEANS IN SAID APPARATUS TO ROTATE SAID CRYSTAL ABOUT AN AXIS OF SAID CRYSTAL AND FOR SIMULTANEOUSLY MOVING SAID CRYSTAL IN AN ORBITAL PATH HAVING A CENTER SPACED FROM SAID AXIS, AND (F) MEANS FOR MOVING SAID APPARATUS AND SAID CRYSTAL IN DIRECTION AWAY FROM SAID MELT.
Claim 2
Independent Claim
96 words
A SYSTEM FOR PRODUCING GROWN SEMICONDUCTOR CRYTALS WHICH COMPRISES: (A) A GAS-TIGHT CHAMBER CONTAINING A QUANTITY OF INERT GAS, (B) A CRUCIBLE WITHIN SAID CHAMBER CONTAINIGN A SEMICONDUCTOR MELT, (C) A SEED CRYSTAL, (D) APPARATUS FOR HOLDING THE EXTREMITY OF SAID SEED CRYSTAL IN CONTACT WITH SAID MELT, (E) MEANS IN SAID APPARATUS TO ROTATE SAID CRYSTAL ABOUT AN AXIS OF SAID CRYSTAL AND FOR SIMULTANEOUSLY MOVING SAID CRYSTAL IN AN ORBITAL PATH HAVING A CENTER SPACED FROM SAID AXIS, AND (F) MEANS FOR MOVING SAID APPARATUS AND SAID CRYSTAL IN DIRECTION AWAY FROM SAID MELT.
References Cited (Backward Citations)
US2727839A
Cited
US2808239A
Cited
US2950219A
Cited
US2935385A
Cited
US2973290A
Cited
US2979386A
Cited
US2975036A
Cited
US2931232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |