US2014873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing sponge iron
Assignee: Individual
•
Filing: 1933-11-11
•
Granted: 1935-09-17
•
Expires: 1953-11-11
Abstract
No abstract record available.
Inventors
- 👤 Harry G Wildman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:05
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0066; C21B13/0046; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
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) | 1938-09-16 | 1939-03-18 | 1939-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-09-16 | 1943-03-18 | 1943-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-09-16 | 1947-03-18 | 1947-09-17 | $7700.00 | Window Closed / Lapsed |