Patent US2929508A successfully refreshed from Google Patents.
US2929508A
Expired / Lapsed
US
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Polymer skimmer
Assignee: Phillips Petroleum Co
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Filing: 1957-12-27
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Granted: 1960-03-22
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Expires: 1977-12-27
Abstract
No abstract record available.
Inventors
- 👤 John M Folz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:37
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/24; B03D1/1412; B03D1/1443; B03D1/1456; B03D1/1462; B03D1/1493
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
APPARATUS, FOR SEPARATING FLOTATABLE SOLIDS FROM A LIQUID, COMPRISING, A COMBINATION, A GENERALLY VERTICAL VESSEL ADAPTED TO CONTAIN A LIQUID, A SMALLER GENERALLY VERTICAL CYLINDRICAL TANK OPEN AT ITS TOP AND POSITIONED WITHIN A LOWER PORTION OF SAID VESSEL, SAID TANK BEING SIZED TO PROVIDE A MAXIMUM HEIGHT RATIO RELATIVE TO SAID VESSEL OF 3 TO 4, MEANS FOR INTRODUCING A SOLIDS CONTAINING POLYMER SLURRY TO SAID TANK SUBSTANTIALLY TANGENTIALLY TO THE INNER SURFACE OF SAID TANK, MEANS FOR MAINTAINING A LIQUID LEVEL IN THE UPPER PORTION OF SAID VESSEL, MEANS FOR REMOVING LIQUID FROM SAID VESSEL AT A POINT BELOW THE TOP LEVEL OF SAID TANK, AND MEANS FOR WITHDRAWING SOLIDS FROM THE LIQUID SURFACE IN SAID VESSEL.
Claim 2
Dependent Claim
119 words
APPARATUS, FOR SEPARATING FLOTATABLE SOLIDS FROM A LIQUID, COMPRISING, A COMBINATION, A GENERALLY VERTICAL VESSEL ADAPTED TO CONTAIN A LIQUID, A SMALLER GENERALLY VERTICAL CYLINDRICAL TANK OPEN AT ITS TOP AND POSITIONED WITHIN A LOWER PORTION OF SAID VESSEL, SAID TANK BEING SIZED TO PROVIDE A MAXIMUM HEIGHT RATIO RELATIVE TO SAID VESSEL OF 3 TO 4, MEANS FOR INTRODUCING A SOLIDS CONTAINING POLYMER SLURRY TO SAID TANK SUBSTANTIALLY TANGENTIALLY TO THE INNER SURFACE OF SAID TANK, MEANS FOR MAINTAINING A LIQUID LEVEL IN THE UPPER PORTION OF SAID VESSEL, MEANS FOR REMOVING LIQUID FROM SAID VESSEL AT A POINT BELOW THE TOP LEVEL OF SAID TANK, AND MEANS FOR WITHDRAWING SOLIDS FROM THE LIQUID SURFACE IN SAID VESSEL.
References Cited (Backward Citations)
US285770A
Cited
US617057A
Cited
USRE22701E
Cited
GB174548A
Cited
US2057883A
Cited
US2539019A
Cited
US2822928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |