US1715155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing oxides or oxide ores
Assignee: Individual
•
Filing: 1925-06-27
•
Granted: 1929-05-28
•
Expires: 1945-06-27
Abstract
No abstract record available.
Inventors
- 👤 Westberg Sigurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:18
CPC Classifications
C; C22; C22B; C22B5/00; C21; C21C; C21C5/00; C21C5/52; C22B5/02; C22B5/12; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1932-05-27 | 1932-11-26 | 1933-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-05-27 | 1936-11-26 | 1937-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-05-27 | 1940-11-26 | 1941-05-28 | $7700.00 | Window Closed / Lapsed |