US3025192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicon carbide crystals and processes and furnaces for making them
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1959-01-02
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Granted: 1962-03-13
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Expires: 1979-01-02
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Lowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:48
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/005; C30B29/00; C30B29/10; C30B29/36; Y; Y10; Y10S; Y10S148/00; Y10S148/148; Y10S438/00; Y10S438/931; Y10T; Y10T117/00; Y10T117/10; Y10T117/102
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A CRYSTAL OF HEXAGONAL SILICON CARBIDE ADAPTED FOR USE IN ELECTRONIC EQUIPMENT HAVING A THICKNESS MEASUREMENT BETWEEN ABOUT 1/2 MIL AND ABOUT 100 MILS AND TWO FACES OF MAXIMUM LENGTH DIMENSION NOT LESS THAN ABOUT 1/16'''' THAT ARE PARALLEL TO EACH OTHER WITHIN AT LEAST ABOUT 1*, SAID CRYSTAL CONTAINING NOT MORE THAN ABOUT 1000 PARTS PER MILLION OF CONSTITUENTS OTHER THAN SILICON AND CARBON AND HAVING AN ELECTRCAL RESTIVITY BETWEEN ABOUT 0.01 AND ABOUT 1000 OHMS-CM.
Claim 2
Dependent Claim
77 words
A CRYSTAL OF HEXAGONAL SILICON CARBIDE ADAPTED FOR USE IN ELECTRONIC EQUIPMENT HAVING A THICKNESS MEASUREMENT BETWEEN ABOUT 1/2 MIL AND ABOUT 100 MILS AND TWO FACES OF MAXIMUM LENGTH DIMENSION NOT LESS THAN ABOUT 1/16'''' THAT ARE PARALLEL TO EACH OTHER WITHIN AT LEAST ABOUT 1*, SAID CRYSTAL CONTAINING NOT MORE THAN ABOUT 1000 PARTS PER MILLION OF CONSTITUENTS OTHER THAN SILICON AND CARBON AND HAVING AN ELECTRCAL RESTIVITY BETWEEN ABOUT 0.01 AND ABOUT 1000 OHMS-CM.
References Cited (Backward Citations)
US2862797A
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US2854364A
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US2854318A
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US2859142A
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US2868678A
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US2878152A
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US2882195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |