Patent US2930784A successfully refreshed from Google Patents.
US2930784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of solids from polymer solutions
Assignee: Phillips Petroleum Co
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Filing: 1956-03-19
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Granted: 1960-03-29
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Expires: 1976-03-19
Abstract
No abstract record available.
Inventors
- 👤 George E Hanson
- 👤 Leo B Croley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
B; B01; B01D; B01D43/00; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PROCESS FOR REMOVING SUSPENDED SOLIDS FROM A SOLUTION OF A NORMALLY SOLID POLYMER IN A SOLVENT, WHICH COMPRISES COOLING SAID SOLUTION TO A TEMPERATURE AT WHICH A MINOR PROPORTION OF THE POLYMER PRECIPITATES FROM SOLUTION, THEREBY AGGLOMERATING SAID SUSPENDED SOLIDS, AND SEPARATING FROM SAID SOLUTION A MIXTURE OF PRECIPITATED POLYMER WITH AT LEAST A PORTION OF SAID SOLIDS.
Claim 2
Dependent Claim
59 words
A PROCESS FOR REMOVING SUSPENDED SOLIDS FROM A SOLUTION OF A NORMALLY SOLID POLYMER IN A SOLVENT, WHICH COMPRISES COOLING SAID SOLUTION TO A TEMPERATURE AT WHICH A MINOR PROPORTION OF THE POLYMER PRECIPITATES FROM SOLUTION, THEREBY AGGLOMERATING SAID SUSPENDED SOLIDS, AND SEPARATING FROM SAID SOLUTION A MIXTURE OF PRECIPITATED POLYMER WITH AT LEAST A PORTION OF SAID SOLIDS.
References Cited (Backward Citations)
US2379237A
Cited
BE530617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |