Patent US2748938A successfully refreshed from Google Patents.
US2748938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation of spodumene
Assignee: Armour and Co
•
Filing: 1952-06-23
•
Granted: 1956-06-05
•
Expires: 1972-06-23
Abstract
No abstract record available.
Inventors
- 👤 Fred H Bunge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:07
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
IN A PROCESS FOR THE CONCENTRATION OF A SPODUMENEBEARING ORE WITHOUT CHEMICAL TREATMENT TO PREPARE THE SURFACE THEREOF, THE STEP OF SUBJECTING SAID CHEMICALLY UNTREATED ORE TO FROTH FLOTATION IN THE PRESENCE OF A SULFONATED OIL TO CAUSE SELECTIVE FLOTATION OF SPODUMENE.
Claim 2
Dependent Claim
42 words
IN A PROCESS FOR THE CONCENTRATION OF A SPODUMENEBEARING ORE WITHOUT CHEMICAL TREATMENT TO PREPARE THE SURFACE THEREOF, THE STEP OF SUBJECTING SAID CHEMICALLY UNTREATED ORE TO FROTH FLOTATION IN THE PRESENCE OF A SULFONATED OIL TO CAUSE SELECTIVE FLOTATION OF SPODUMENE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |