US2296841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for beneficiation of manganese ores
Assignee: Individual
•
Filing: 1941-03-01
•
Granted: 1942-09-29
•
Expires: 1961-03-01
Abstract
No abstract record available.
Inventors
- 👤 Gardner Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:42
CPC Classifications
C; C22; C22B; C22B47/00; C22B3/00; C22B3/04; C22B3/16; C22B3/1608; C22B3/1616; C22B3/165; 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) | 1945-09-28 | 1946-03-30 | 1946-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-09-28 | 1950-03-30 | 1950-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-09-28 | 1954-03-30 | 1954-09-29 | $7700.00 | Window Closed / Lapsed |