US1833801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for baking carbonaceous materials
Assignee: Trent Process Corp
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Filing: 1928-01-18
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Granted: 1931-11-24
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Expires: 1948-01-18
Abstract
No abstract record available.
Inventors
- 👤 Walter E Trent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:39
CPC Classifications
F; F26; F26B; F26B23/00; F26B23/10; F26B15/00; F26B15/10; F26B15/12; F26B15/14; F26B21/00; F26B21/20; F26B21/25
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) | 1934-11-23 | 1935-05-25 | 1935-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-11-23 | 1939-05-25 | 1939-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-11-23 | 1943-05-25 | 1943-11-24 | $7700.00 | Window Closed / Lapsed |