US1899808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of coking carbonizable material
Assignee: Individual
•
Filing: 1929-02-23
•
Granted: 1933-02-28
•
Expires: 1949-02-23
Abstract
No abstract record available.
Inventors
- 👤 Kern Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:53
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/04; C10B57/06; C10B53/00; C10B53/08
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) | 1936-02-28 | 1936-08-29 | 1937-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-28 | 1940-08-29 | 1941-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-28 | 1944-08-29 | 1945-02-28 | $7700.00 | Window Closed / Lapsed |