Patent US3256141A successfully refreshed from Google Patents.
US3256141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the efficiency of vacuum and flotation type white water recovery systems using an acrylamide terpolymer
Assignee: ChampionX LLC
•
Filing: 1964-10-27
•
Granted: 1966-06-14
•
Expires: 1984-10-27
Abstract
No abstract record available.
Inventors
- 👤 William M Stephenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:48
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/66; D21F1/82; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF IMPROVING THE OPERATIONAL EFFICIENCY OF VACUUM AND FLOTATION TYPE WHITE WATER RECOVERY SYSTEMS WHICH COMPRISES THE STEP OF TREATING SAID WHITE WATER WITH AT LEAST AN EFFICIENCY IMPROVING DOSAGE OF AT LEAST 0.01 P.P.M. OF AN ORGANIC WATER-SOLUBLE TERPOLYMER FORMED AS THE REACTION PRODUCT OF 85.0-95.0 PARTS BY WEIGHT OF ACRYLAMIDE, 0.3-2.0 PARTS BY WEIGHT OF A POLYMERIZABLE POLYCARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE AND FUMARIC ACID AND 3-15 PARTS BY WEIGHT OF AN ETHYLENICALLY UNSATURATED WATER-SOLUBLE MONOMER DIFFERING FROM THE ABOVE MONOMERS.
Claim 2
Independent Claim
92 words
A METHOD OF IMPROVING THE OPERATIONAL EFFICIENCY OF VACUUM AND FLOTATION TYPE WHITE WATER RECOVERY SYSTEMS WHICH COMPRISES THE STEP OF TREATING SAID WHITE WATER WITH AT LEAST AN EFFICIENCY IMPROVING DOSAGE OF AT LEAST 0.01 P.P.M. OF AN ORGANIC WATER-SOLUBLE TERPOLYMER FORMED AS THE REACTION PRODUCT OF 85.0-95.0 PARTS BY WEIGHT OF ACRYLAMIDE, 0.3-2.0 PARTS BY WEIGHT OF A POLYMERIZABLE POLYCARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE AND FUMARIC ACID AND 3-15 PARTS BY WEIGHT OF AN ETHYLENICALLY UNSATURATED WATER-SOLUBLE MONOMER DIFFERING FROM THE ABOVE MONOMERS.
References Cited (Backward Citations)
US2980609A
Cited
US3019157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |