US1431877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smelting ores or the like
Assignee: Individual
•
Filing: 1920-08-06
•
Granted: 1922-10-10
•
Expires: 1940-08-06
Abstract
No abstract record available.
Inventors
- 👤 Diehl Ludwig Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:25
CPC Classifications
C; C21; C21B; C21B3/00; C21B3/04; C21B5/00; C21B5/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y10; Y10S; Y10S75/00; Y10S75/958
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) | 1925-10-09 | 1926-04-10 | 1926-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-10-09 | 1930-04-10 | 1930-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-10-09 | 1934-04-10 | 1934-10-10 | $7700.00 | Window Closed / Lapsed |