Patent US1374652A successfully refreshed from Google Patents.
Patent US2547148A successfully refreshed from Google Patents.
US2547148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beneficiation of iron ores
Assignee: California Research LLC
•
Filing: 1949-02-18
•
Granted: 1951-04-03
•
Expires: 1969-02-18
Abstract
No abstract record available.
Inventors
- 👤 William A Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:14
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/012; B03D1/006; B03D2201/00; B03D2201/02; B03D2203/00; B03D2203/02; B03D2203/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE RECOVERY OF IRON MINERALS FROM IRON-BEARING ORES, WHICH COMPRISES FORMING AN AQUEOUS PULP OF AN IRON OXIDE-BEARING ORE AND EFFECTING FROTH FLOATION OF SAID AQUEOUS PULP IN THE PRESENCE OF APOLYALKYLATED MONONUCLEAR AROMATIC SULFONIC ACID, SAID ACID BEING A SULFONATED BOTTOMS FRACTION FROM THE ALKYLATION OF A MONONUCLEAR AROMATIC HYDROCARBON WITH AN OLEFIN CONTAINING FROM 9 TO 18 CARBON ATOMS AND BOILING BETWEEN ABOUT 250* F. TO ABOUT 600* F., SAID BOTTOMS FRACTION BOILING ABOVE THE BOILING POINT OF A MONOALKYLATED AROMATIC HYDROCARBON IN WHICH THE ALKYL PORTION CORRESPONDS TO SAID OLEFIN.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE RECOVERY OF IRON MINERALS FROM IRON-BEARING ORES, WHICH COMPRISES FORMING AN AQUEOUS PULP OF AN IRON OXIDE-BEARING ORE AND EFFECTING FROTH FLOATION OF SAID AQUEOUS PULP IN THE PRESENCE OF APOLYALKYLATED MONONUCLEAR AROMATIC SULFONIC ACID, SAID ACID BEING A SULFONATED BOTTOMS FRACTION FROM THE ALKYLATION OF A MONONUCLEAR AROMATIC HYDROCARBON WITH AN OLEFIN CONTAINING FROM 9 TO 18 CARBON ATOMS AND BOILING BETWEEN ABOUT 250* F. TO ABOUT 600* F., SAID BOTTOMS FRACTION BOILING ABOVE THE BOILING POINT OF A MONOALKYLATED AROMATIC HYDROCARBON IN WHICH THE ALKYL PORTION CORRESPONDS TO SAID OLEFIN.
References Cited (Backward Citations)
US2164063A
Cited
US2230565A
Cited
USRE22548E
Cited
US2202601A
Cited
US2410376A
Cited
US2410377A
Cited
US2385054A
Cited
US2475581A
Cited
US2414714A
Cited
US2461875A
Cited
US2467176A
Cited
US2456119A
Cited
US2480592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |