US3234076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving retention of fillers in paper making with acrylamidediallylamine copolymer
Assignee: ChampionX LLC
•
Filing: 1963-01-08
•
Granted: 1966-02-08
•
Expires: 1983-01-08
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Goldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:54
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H17/45; D21H17/455; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A METHOD OF IMPROVING THE RETENTION OF INORGANIC FILLER AND FIBER FINES IN THE PROCESSING OF PAPER WHICH COMPRISES THE STEP OF ADDING TO AN AQUEOUS FILLED PAPER PULP SUSPENSION AT LEAST A RETENTION IMPROVING DOSAGE OF AN ORGANIC WATER-SOLUBLE COPOLYMER FORMED AS THE REACTION PRODUCT OF 50-95 PARTS BY WEIGHT OF ACRYLAMIDE AND 5-50 PARTS BY WEIGHT OF A POLYMERIZABLE COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIALLYLAMINE AND SALTS THEREOF.
Claim 2
Independent Claim
72 words
A METHOD OF IMPROVING THE RETENTION OF INORGANIC FILLER AND FIBER FINES IN THE PROCESSING OF PAPER WHICH COMPRISES THE STEP OF ADDING TO AN AQUEOUS FILLED PAPER PULP SUSPENSION AT LEAST A RETENTION IMPROVING DOSAGE OF AN ORGANIC WATER-SOLUBLE COPOLYMER FORMED AS THE REACTION PRODUCT OF 50-95 PARTS BY WEIGHT OF ACRYLAMIDE AND 5-50 PARTS BY WEIGHT OF A POLYMERIZABLE COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIALLYLAMINE AND SALTS THEREOF.
References Cited (Backward Citations)
US2972560A
Cited
US3032539A
Cited
US2871229A
Cited
US3057833A
Cited
GB883973A
Cited
US3077430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |