Patent US3480761A successfully refreshed from Google Patents.
US3480761A
Expired / Lapsed
US
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Clear overflow settling with very high molecular weight polyelectrolytes
Assignee: Wyeth Holdings LLC
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Filing: 1958-08-22
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Granted: 1969-11-25
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Expires: 1978-08-22
Abstract
No abstract record available.
Inventors
- 👤 Edwin Ralph Kolodny
- 👤 Robert Ben Booth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:06
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0204; C22B60/0217; C22B60/0252; C22B60/0278; B; B01; B01J; B01J20/00; B01J20/22; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; C09; C09K; C09K8/00; C09K8/58; C09K8/588; C02F2101/00; C02F2101/006; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF CLARIFYING A LIQUID SUSPENSION OF SOLIDS SUSPENDED IN AN AQUEOUS PHASE COMPRISING THE STEPS OF ADDING TO SAID SUSPENSION A WATER-SOLUBLE POLYACRYLAMIDE, HAVING AN INTRINSIC VISCOSITY OF AT LEAST 12 DECILITERS PER GRAM, AND A CARBOXYL CONTENT OF NOT MORE THAN ABOUT 1/2% OF THE POLYMER UNITS, IN AN AMOUNT SUFFICIENT TO FLOCCULATE AND AGGLOMERATE SAID SUSPENDED SOLIDS, AND SEPARATING THE FLOCCULATED AND AGGLOMERATED SOLIDS FROM THE AQUEOUS LIQUID.
Claim 2
Independent Claim
72 words
THE METHOD OF CLARIFYING A LIQUID SUSPENSION OF SOLIDS SUSPENDED IN AN AQUEOUS PHASE COMPRISING THE STEPS OF ADDING TO SAID SUSPENSION A WATER-SOLUBLE POLYACRYLAMIDE, HAVING AN INTRINSIC VISCOSITY OF AT LEAST 12 DECILITERS PER GRAM, AND A CARBOXYL CONTENT OF NOT MORE THAN ABOUT 1/2% OF THE POLYMER UNITS, IN AN AMOUNT SUFFICIENT TO FLOCCULATE AND AGGLOMERATE SAID SUSPENDED SOLIDS, AND SEPARATING THE FLOCCULATED AND AGGLOMERATED SOLIDS FROM THE AQUEOUS LIQUID.
References Cited (Backward Citations)
US3418237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |