US2331338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the thermal treatment of carbonaceous material
Assignee: Individual
•
Filing: 1940-07-13
•
Granted: 1943-10-12
•
Expires: 1960-07-13
Abstract
No abstract record available.
Inventors
- 👤 Michael Wilhelm
- 👤 Goehre Otto
- 👤 Free Gerhard
- 👤 Wilhelm V Fuener
- 👤 Schneider Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:06
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J21/00; B01J21/06; B01J21/08; Y; Y10; Y10S; Y10S208/00; Y10S208/95
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) | 1946-10-11 | 1947-04-12 | 1947-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-10-11 | 1951-04-12 | 1951-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-10-11 | 1955-04-12 | 1955-10-12 | $7700.00 | Window Closed / Lapsed |