US2539485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of manganese from compound silicate material
Assignee: Sylvester and Co
•
Filing: 1949-04-09
•
Granted: 1951-01-30
•
Expires: 1969-04-09
Abstract
No abstract record available.
Inventors
- 👤 Robert A Schoenlaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:27
CPC Classifications
C; C22; C22B; C22B47/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
IN A PROCESS OF OBTAINING AN OXIDE OF MANGANESE FROM SOLID SLAG COMPRISING A COMPOUND SILICATE MATERIAL CONTAINING CALCIUM, IRON AND MANGANESE, ADDING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF OXYGEN-CONTAINING CALCIUM AND SILICON MATERIALS TO SAID SLAG MATERIAL TO GIVE THE MIXTURE A MOLAR RATIO
References Cited (Backward Citations)
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US2409428A
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US2352712A
Cited
US2471562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |