US1461807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of treating ores
Assignee: Merrill Co
•
Filing: 1921-10-18
•
Granted: 1923-07-17
•
Expires: 1941-10-18
Abstract
No abstract record available.
Inventors
- 👤 Silver Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:54
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/08
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) | 1926-07-16 | 1927-01-15 | 1927-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-07-16 | 1931-01-15 | 1931-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-07-16 | 1935-01-15 | 1935-07-17 | $7700.00 | Window Closed / Lapsed |