Patent US3204877A successfully refreshed from Google Patents.
US3204877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate recovery process
Assignee: WR Grace and Co
•
Filing: 1962-04-09
•
Granted: 1965-09-07
•
Expires: 1982-04-09
Abstract
No abstract record available.
Inventors
- 👤 Jr James A Barr
- 👤 Charles H Greene
- 👤 Clarence G Olsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:16
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD FOR BENEFICIATING PHOSPHATIC ORES WHICH COMPRISES FORMING A SLURRY OF PHOSPHATE ORE AND WATER, SUBJECTING SAID SLURRY TO HIGH VELOCITY JETS OF WATER HAVING A NOZZLE VELOCITY IN EXCESS OF 352 FT./SEC. WHICH STRIKE THE PARTICLES IN SAID SLURRY WHEREBY SAID ORE IS SUBSTANTIALLY DISINTEGRATED INTO ITS COMPONENT PARTS AND RECOVERING PHOSPHATE VALUES FROM SAID DISINTEGRATED ORE.
Claim 2
Independent Claim
59 words
A METHOD FOR BENEFICIATING PHOSPHATIC ORES WHICH COMPRISES FORMING A SLURRY OF PHOSPHATE ORE AND WATER, SUBJECTING SAID SLURRY TO HIGH VELOCITY JETS OF WATER HAVING A NOZZLE VELOCITY IN EXCESS OF 352 FT./SEC. WHICH STRIKE THE PARTICLES IN SAID SLURRY WHEREBY SAID ORE IS SUBSTANTIALLY DISINTEGRATED INTO ITS COMPONENT PARTS AND RECOVERING PHOSPHATE VALUES FROM SAID DISINTEGRATED ORE.
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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |