Patent US2792940A successfully refreshed from Google Patents.
US2792940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for concentrating the titanium oxide minerals in beach sand
Assignee: Armour and Co
•
Filing: 1954-10-27
•
Granted: 1957-05-21
•
Expires: 1974-10-27
Abstract
No abstract record available.
Inventors
- 👤 Robert E Baarson
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; B03D1/002; B03D2201/00; B03D2201/02; B03D2201/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF CONCENTRATING TITANIUM OXIDE MINERALS FROM BEACH SAND HAVING FILMS OF ORGANIC MINERALS ON THE PARTICLES THEREIN AND BEING COMPOSED PRINCIPALLY OF QUARTZ PARTICLES WHILE CONTAINING TITANIUM OXIDE MINERAL PARTICLES, COMPRISING REMOVING THE ORGANIC FILMS FROM THE PARTICLES OF SAID SAND, AND THEN FLOATING THE TITANIUM OXIDE MINERAL PARTICLES AWAY FROM THE ZUARTZ PARTICLES OF SAID SAND IN WATER CONTAINING AN AMINE COLLECTOR AND A FLOURINE-CONTAINING ACID AND BEING AT A PH BELOW 5.0.
Claim 2
Independent Claim
76 words
THE METHOD OF CONCENTRATING TITANIUM OXIDE MINERALS FROM BEACH SAND HAVING FILMS OF ORGANIC MINERALS ON THE PARTICLES THEREIN AND BEING COMPOSED PRINCIPALLY OF QUARTZ PARTICLES WHILE CONTAINING TITANIUM OXIDE MINERAL PARTICLES, COMPRISING REMOVING THE ORGANIC FILMS FROM THE PARTICLES OF SAID SAND, AND THEN FLOATING THE TITANIUM OXIDE MINERAL PARTICLES AWAY FROM THE ZUARTZ PARTICLES OF SAID SAND IN WATER CONTAINING AN AMINE COLLECTOR AND A FLOURINE-CONTAINING ACID AND BEING AT A PH BELOW 5.0.
References Cited (Backward Citations)
US2387856A
Cited
US2557455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-20 | 1960-11-19 | 1961-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-20 | 1964-11-19 | 1965-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-20 | 1968-11-19 | 1969-05-21 | $7700.00 | Window Closed / Lapsed |