Patent US3200105A successfully refreshed from Google Patents.
US3200105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter aid conditioning
Assignee: Phillips Petroleum Co
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Filing: 1960-08-08
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Granted: 1965-08-10
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Expires: 1980-08-08
Abstract
No abstract record available.
Inventors
- 👤 Franklin T Barber
- 👤 Robert G Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:22
CPC Classifications
B; B01; B01D; B01D37/00; B01D37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A METHOD FOR REMOVING SOLIDS FROM A SOLUTION OF A NORMALLY SOLID OLEFIN PALYMER IN A SOLVENT WHICH COMPRISES INTRODUCING SAID SOLUTION CONTAINING SUSPENDED SOLIDS INTO A FIRST FILTER ZONE; PASSING SAID SOLUTION THROUGH FILTER MEDIUM DISPOSED WITHIN SAID FIRST FILTER ZONE, SAID FILTER MEDIUM BEING COATED WITH FILTER AID BEING SELECTED FROM THE GROUP CONSISTING OF ASBESTOS, DIATOMACEOUS EARTH PERLITE, ACTIVATED CARBON, AND COLLOIDAL CLAYS, AS A PRECOAT MATERIAL; AND WITHDRAWING SAID SOLUTION SUBSTANTIALLY FREE OF SAID SOLIDS FROM SAID FIRST FILTER ZONE; THE IMPROVEMENT WHICH COMPRISES PREPARING SAID PRECOAT MATERIAL FROM HYDROCARBON SLURRY OF FILTER AID, SAID FILTER AID HAVING A WATER CONTENT RANGING BETWEEN 210-300 P.P.M. AND
Claim 2
Dependent Claim
111 words
IN A METHOD FOR REMOVING SOLIDS FROM A SOLUTION OF A NORMALLY SOLID OLEFIN PALYMER IN A SOLVENT WHICH COMPRISES INTRODUCING SAID SOLUTION CONTAINING SUSPENDED SOLIDS INTO A FIRST FILTER ZONE; PASSING SAID SOLUTION THROUGH FILTER MEDIUM DISPOSED WITHIN SAID FIRST FILTER ZONE, SAID FILTER MEDIUM BEING COATED WITH FILTER AID BEING SELECTED FROM THE GROUP CONSISTING OF ASBESTOS, DIATOMACEOUS EARTH PERLITE, ACTIVATED CARBON, AND COLLOIDAL CLAYS, AS A PRECOAT MATERIAL; AND WITHDRAWING SAID SOLUTION SUBSTANTIALLY FREE OF SAID SOLIDS FROM SAID FIRST FILTER ZONE; THE IMPROVEMENT WHICH COMPRISES PREPARING SAID PRECOAT MATERIAL FROM HYDROCARBON SLURRY OF FILTER AID, SAID FILTER AID HAVING A WATER CONTENT RANGING BETWEEN 210-300 P.P.M. AND
References Cited (Backward Citations)
US2040818A
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US2668151A
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US2702288A
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US2849429A
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US2963469A
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US3031439A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |