US1459187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of reducing metallic oxides
Assignee: Individual
•
Filing: 1920-11-02
•
Granted: 1923-06-19
•
Expires: 1940-11-02
Abstract
No abstract record available.
Inventors
- 👤 Pratt Emil Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:09
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/14; C21B13/06; C21B13/12; 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) | 1926-06-18 | 1926-12-18 | 1927-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-06-18 | 1930-12-18 | 1931-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-06-18 | 1934-12-18 | 1935-06-19 | $7700.00 | Window Closed / Lapsed |