US2148133A
Expired / Lapsed
US
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Molded carbon electrode and method of preparing the same
Assignee: HYGRADE SYLVANLA Corp
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Filing: 1935-06-25
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Granted: 1939-02-21
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Expires: 1955-06-25
Abstract
No abstract record available.
Inventors
- 👤 Benediet R Reuscher
- 👤 John M Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:49
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/02; H05B31/06; H05B31/08; H05B31/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-02-20 | 1942-08-22 | 1943-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-02-20 | 1946-08-22 | 1947-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-02-20 | 1950-08-22 | 1951-02-21 | $7700.00 | Window Closed / Lapsed |