US1679294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of ores of copper and other metals
Assignee: Individual
•
Filing: 1927-10-31
•
Granted: 1928-07-31
•
Expires: 1947-10-31
Abstract
No abstract record available.
Inventors
- 👤 Dietzsch Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/08; C22B15/00; C22B15/0002; C22B15/001; C22B15/0013; C22B15/0063; C22B15/0065; C22B15/0067; C22B19/00; C22B19/20; C22B19/22; 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) | 1931-07-31 | 1932-01-30 | 1932-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-31 | 1936-01-30 | 1936-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-31 | 1940-01-30 | 1940-07-31 | $7700.00 | Window Closed / Lapsed |