Patent US1797805A successfully refreshed from Google Patents.
US1797805A
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Protected carbon electrode
Assignee: IG Farbenindustrie AG
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Filing: 1928-12-06
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Granted: 1931-03-24
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Expires: 1948-12-06
Abstract
No abstract record available.
Inventors
- 👤 Suchy Robert
- 👤 Staib Karl
- 👤 Moschel Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:27
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5007; C04B41/5015; C04B41/80; C04B41/81; C04B41/85; H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085; C04B2111/00; C04B2111/00474; C04B2111/0087
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) | 1934-03-23 | 1934-09-22 | 1935-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-03-23 | 1938-09-22 | 1939-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-03-23 | 1942-09-22 | 1943-03-24 | $7700.00 | Window Closed / Lapsed |