US2995503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for electrical precipitation of insoluble gel from linear polymer solutions
Assignee: Phillips Petroleum Co
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Filing: 1957-10-11
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Granted: 1961-08-08
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Expires: 1977-10-11
Abstract
No abstract record available.
Inventors
- 👤 Paul F Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:52
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06; B; B01; B01J; B01J13/00; B01J13/0052; B01J13/0065; C08C; C08C2/00; C08C2/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF REMOVING GEL, WHICH IS AN INSOLUBLE BY-PRODUCT IN THE PRODUCTION OF A LINEAR POLYMER IN THE PRESENCE OF AN INERT ORGANIC SOLVENT, FROM A SOLUTION CONTAINING SAID GEL IN ADMIXTURE WITH A SOLUTION OF SAID LINEAR POLYMER IN SAID SOLVENT WHICH COMPRISES SUBJECTING THE SOLUTION TO A DIRECT CURRENT ELECTROSTATIC FIELD OF SUFFICIENT VOLTAGE TO AGGLOMERATE GEL, REMOVING AGGLOMERATED GEL, AND RECOVERING POLYMER SOLUTION OF REDUCED GEL CONTENT.
Claim 2
Independent Claim
71 words
THE METHOD OF REMOVING GEL, WHICH IS AN INSOLUBLE BY-PRODUCT IN THE PRODUCTION OF A LINEAR POLYMER IN THE PRESENCE OF AN INERT ORGANIC SOLVENT, FROM A SOLUTION CONTAINING SAID GEL IN ADMIXTURE WITH A SOLUTION OF SAID LINEAR POLYMER IN SAID SOLVENT WHICH COMPRISES SUBJECTING THE SOLUTION TO A DIRECT CURRENT ELECTROSTATIC FIELD OF SUFFICIENT VOLTAGE TO AGGLOMERATE GEL, REMOVING AGGLOMERATED GEL, AND RECOVERING POLYMER SOLUTION OF REDUCED GEL CONTENT.
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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) | 1964-08-07 | 1965-02-06 | 1965-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-07 | 1969-02-06 | 1969-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-07 | 1973-02-06 | 1973-08-08 | $7700.00 | Window Closed / Lapsed |