US3230053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing high purity silicon carbide crystals
Assignee: Individual
•
Filing: 1963-09-25
•
Granted: 1966-01-18
•
Expires: 1983-09-25
Abstract
No abstract record available.
Inventors
- 👤 Noel T Wakelyn
- 👤 Robert A Jewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:52
CPC Classifications
C; C30; C30B; C30B25/00; C30B25/005; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C30B29/00; C30B29/10; C30B29/36; Y; Y10; Y10S; Y10S148/00; Y10S148/148; Y10T; Y10T117/00; Y10T117/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2602033A
Cited
US2677627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |