US2984549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor product and method
Assignee: Clevite Corp
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Filing: 1957-06-21
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Granted: 1961-05-16
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Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 Roberts Cornelius Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:55
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/36; C23; C23F; C23F1/00; C23F1/02; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/051; Y10S148/115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE METHOD OF MANUFACTURING A SEMICONDUCTOR PRODUCT WHICH COMPRISES THE STEPS OF GROWING A CRYSTAL HAVING AT LEAST ONE TWIN BOUNDARY WHEREBY DIFFERENT CRYSTALLOGRAPHIC FACES ARE PRESENTED AT THE SURFACE, AND ETCHING THE CRYSTAL, SAID ETCHING SERVING TO ETCH DIFFERENT CRYSTALLOGRAPHIC FACES AT DIFFERENT RATES.
Claim 2
Independent Claim
45 words
THE METHOD OF MANUFACTURING A SEMICONDUCTOR PRODUCT WHICH COMPRISES THE STEPS OF GROWING A CRYSTAL HAVING AT LEAST ONE TWIN BOUNDARY WHEREBY DIFFERENT CRYSTALLOGRAPHIC FACES ARE PRESENTED AT THE SURFACE, AND ETCHING THE CRYSTAL, SAID ETCHING SERVING TO ETCH DIFFERENT CRYSTALLOGRAPHIC FACES AT DIFFERENT RATES.
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) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |