US1360666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of extracting copper from its ores
Assignee: Merrill Co
•
Filing: 1917-01-23
•
Granted: 1920-11-30
•
Expires: 1937-01-23
Abstract
No abstract record available.
Inventors
- 👤 Louis D Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:06
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0063; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S209/00; Y10S209/901
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) | 1923-11-30 | 1924-05-31 | 1924-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1927-11-30 | 1928-05-31 | 1928-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1931-11-30 | 1932-05-31 | 1932-11-30 | $7700.00 | Window Closed / Lapsed |