Patent US3210308A successfully refreshed from Google Patents.
US3210308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric flocculants
Assignee: Dow Chemical Co
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Filing: 1962-07-06
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Granted: 1965-10-05
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Expires: 1982-07-06
Abstract
No abstract record available.
Inventors
- 👤 David C Garms
- 👤 Floyd E Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:46
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; Y; Y10; Y10S; Y10S524/00; Y10S524/922
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
181 words
A METHOD FOR PREPARING A HIGH MOLECULAR WEIGHT WATER-SOLUBLE POLYMER OF THE CLASS CONSISTING OF POLYALKYLENIMINES AND POLYALKYLENEPOLYAMINES WHICH COMPRISES: (1) MIXING TOGETHER (A) A SOLUTION CONTAINING FROM ABOUT 20 TO 60 WEIGHT OF PERCENT OF A SOLUTE MEMBER OF THE GROUP CONSISTING OF ALKYLENIMINES AND POLYALKYLENEPOLYAMINES, SAID ALKYLENIMINE BEING SELECTED FROM THE GROUP CONSISTING OF ETHYLENIMINE, PROPYLENIMINE, ISOBUTYLENIMINE, 1,2-BUTYLENIMINE AND 2,3-BUTYLENIMINE, SAID POLYALKYLENEPOLYAMINE HAVING A MINIMUM MOLECULAR WEIGHT OF AT LEAST ABOUT 400, SAID SOLUTION CONTAINING FROM ABOUT 80 TO 40 WEIGHT PERCENT OF A SOLVENT MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER, WATER-SOLUBLE ALCOHOLS, AND MIXTURES THEREOF, AND (B) A VICINAL DIHALOALKANE IN AN AMOUNT FROM ABOUT 2.5 TO 4.5 WEIGHT PERCENT OF ALKYLENIMINE EMPLOYED AND FROM ABOUT 15 PERCENT TO 25 PERCENT BY WEIGHT OF POLYALKYLENEPOLYAMINE EMPLOYED; AND (2) MAINTAINING THE TEMPERATURE OF THE MIXTURE AT FROM ABOUT 20* TO 140*C. FOR A PERIOD OF TIME SUFFICIENT TO YIELD A HIGH MOLECULAR WEIGHT, WATERSOLUBLE POLYMERIC PRODUCT HAVING VALUABLE UTILITY AS A FLOCCULENT; AND (3) SUBJECTING SAID MIXTURE TO A SHEARING FORCE DURING THE FORMATION OF SAID POLYMER.
Claim 2
Independent Claim
181 words
A METHOD FOR PREPARING A HIGH MOLECULAR WEIGHT WATER-SOLUBLE POLYMER OF THE CLASS CONSISTING OF POLYALKYLENIMINES AND POLYALKYLENEPOLYAMINES WHICH COMPRISES: (1) MIXING TOGETHER (A) A SOLUTION CONTAINING FROM ABOUT 20 TO 60 WEIGHT OF PERCENT OF A SOLUTE MEMBER OF THE GROUP CONSISTING OF ALKYLENIMINES AND POLYALKYLENEPOLYAMINES, SAID ALKYLENIMINE BEING SELECTED FROM THE GROUP CONSISTING OF ETHYLENIMINE, PROPYLENIMINE, ISOBUTYLENIMINE, 1,2-BUTYLENIMINE AND 2,3-BUTYLENIMINE, SAID POLYALKYLENEPOLYAMINE HAVING A MINIMUM MOLECULAR WEIGHT OF AT LEAST ABOUT 400, SAID SOLUTION CONTAINING FROM ABOUT 80 TO 40 WEIGHT PERCENT OF A SOLVENT MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER, WATER-SOLUBLE ALCOHOLS, AND MIXTURES THEREOF, AND (B) A VICINAL DIHALOALKANE IN AN AMOUNT FROM ABOUT 2.5 TO 4.5 WEIGHT PERCENT OF ALKYLENIMINE EMPLOYED AND FROM ABOUT 15 PERCENT TO 25 PERCENT BY WEIGHT OF POLYALKYLENEPOLYAMINE EMPLOYED; AND (2) MAINTAINING THE TEMPERATURE OF THE MIXTURE AT FROM ABOUT 20* TO 140*C. FOR A PERIOD OF TIME SUFFICIENT TO YIELD A HIGH MOLECULAR WEIGHT, WATERSOLUBLE POLYMERIC PRODUCT HAVING VALUABLE UTILITY AS A FLOCCULENT; AND (3) SUBJECTING SAID MIXTURE TO A SHEARING FORCE DURING THE FORMATION OF SAID POLYMER.
Claim 3
Dependent Claim
8 words
THE PRODUCT OF THE PROCESS OF CLAIM 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |