US3008575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Figure
Assignee: —
•
Filing: —
•
Granted: 1961-11-14
•
Expires: 1978-11-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:01
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/623; B01; B01D; B01D21/00; B01D21/0012; B01D21/0039; B01D21/0045; B01D21/24; B01D21/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF DESLIMING PHOSPHATE MATRIX WHICH COMPRISES PASSING A WATER SLURRY OF SLIME-CONTAINING PHOSPHATE MATRIX DOWN AN INCLINED FLAT SCREEN, SEPARATELY COLLECTING THE MATERIAL WHICH PASSES THROUGH AN INITIAL SECTION OF THE FLAT SCREEN IN A FIRST COLLECTING ZONE AND THE MATERIAL WHICH PASSES THROUGH A SUCCEEDING SECTION OF THE FLAT SCREEN IN A SECOND COLLECTING ZONE, MAINTAINING A SUBSTANTIALLY CONSTANT PRESSURE HEAD IN SAID FIRST COLLECTING ZONE,
Claim 2
Independent Claim
69 words
A METHOD OF DESLIMING PHOSPHATE MATRIX WHICH COMPRISES PASSING A WATER SLURRY OF SLIME-CONTAINING PHOSPHATE MATRIX DOWN AN INCLINED FLAT SCREEN, SEPARATELY COLLECTING THE MATERIAL WHICH PASSES THROUGH AN INITIAL SECTION OF THE FLAT SCREEN IN A FIRST COLLECTING ZONE AND THE MATERIAL WHICH PASSES THROUGH A SUCCEEDING SECTION OF THE FLAT SCREEN IN A SECOND COLLECTING ZONE, MAINTAINING A SUBSTANTIALLY CONSTANT PRESSURE HEAD IN SAID FIRST COLLECTING ZONE,
References Cited (Backward Citations)
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Cited
US1700925A
Cited
US2163927A
Cited
US2763371A
Cited
GB726616A
Cited
GB726757A
Cited
US2870908A
Cited
US2941783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-13 | 1965-05-15 | 1965-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-13 | 1969-05-15 | 1969-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-13 | 1973-05-15 | 1973-11-14 | $7700.00 | Window Closed / Lapsed |