US3264174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metal aluminate modified starch and process of preparing paper therewith
Assignee: ChampionX LLC
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Filing: 1964-01-29
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Granted: 1966-08-02
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Expires: 1984-01-29
Abstract
No abstract record available.
Inventors
- 👤 Aitken Thomas
- 👤 William V Cross
- 👤 Fred W Webking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:08
CPC Classifications
C; C08; C08B; C08B30/00; C08B30/12; D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
A PROCESS FOR THE PRODUCTION OF PAPER HAVING IMPROVED DRY STRENGTH AND OTHER IMPROVED PROPERTIES WHICH COMPRISES THE SEQUENTIAL STEPS OF FROMING AN AQUEOUS CELLULOSIC FIBER SUSPENSION, ADDING TO SAID SUSPENSION AT A POINT PRIOR TO ITS FORMATION INTO A SHEET, AN ALKALI METAL ALUMINATE MODIFIED STARCH, SAID MODIFIED STARCH HAVING BEEN PREPARED FROM BY COOKING AN AQUEOUS SUSPENSION OF A STARCH WITH FROM 1-30% BY WEIGHT OF AN ALKLAI METAL ALUMINATE BASED ON THE WEIGHT OF THE STARCH IN SAID SUSPENSION AT A TEMPERATURE OF AT LEAST 6O*C. AND LESS THAN 100*C., FOR AT LEAST SUFFICIENT TIME FOR THE VISCOSITY OF SAID SUSPENSION TO REACH 75% OF ITS MAXIMUM, ADJUSTING THE PH OF THE THUS TREATED CELLULOSIC FIBER SUSPENSION TO BETWEEN 4.5 AND 7.0, AND THEN FORMING SAID AQUEOUS CELLULOSIC FIBER SUSPENSION INTO A SHEET.
Claim 2
Dependent Claim
136 words
A PROCESS FOR THE PRODUCTION OF PAPER HAVING IMPROVED DRY STRENGTH AND OTHER IMPROVED PROPERTIES WHICH COMPRISES THE SEQUENTIAL STEPS OF FROMING AN AQUEOUS CELLULOSIC FIBER SUSPENSION, ADDING TO SAID SUSPENSION AT A POINT PRIOR TO ITS FORMATION INTO A SHEET, AN ALKALI METAL ALUMINATE MODIFIED STARCH, SAID MODIFIED STARCH HAVING BEEN PREPARED FROM BY COOKING AN AQUEOUS SUSPENSION OF A STARCH WITH FROM 1-30% BY WEIGHT OF AN ALKLAI METAL ALUMINATE BASED ON THE WEIGHT OF THE STARCH IN SAID SUSPENSION AT A TEMPERATURE OF AT LEAST 6O*C. AND LESS THAN 100*C., FOR AT LEAST SUFFICIENT TIME FOR THE VISCOSITY OF SAID SUSPENSION TO REACH 75% OF ITS MAXIMUM, ADJUSTING THE PH OF THE THUS TREATED CELLULOSIC FIBER SUSPENSION TO BETWEEN 4.5 AND 7.0, AND THEN FORMING SAID AQUEOUS CELLULOSIC FIBER SUSPENSION INTO A SHEET.
Claim 3
Dependent Claim
64 words
A MODIFIED STARCH COMPRISING 70-98% BY WEIGHT OF STARCH, AND 1-30% BY WEIGHT OF AN ALKALI METAL ALUMINA, SAID STARCH HAVING BEEN PREPARED BY COOKING AN AQUEOUS SUSPENSION OF SAID STARCH WITH THE ALKALI METAL ALUMINATE AT A TEMPERATURE OF AT LEAST 60*C. AND LESS THAN 100*C., FOR AT LEAST SUFFICIENT TIME FOR THE VISCOSITY OF SAID SUSPENSION TO REACH 75% OF ITS MAXIMUM.
Claim 4
Dependent Claim
64 words
A MODIFIED STARCH COMPRISING 70-98% BY WEIGHT OF STARCH, AND 1-30% BY WEIGHT OF AN ALKALI METAL ALUMINA, SAID STARCH HAVING BEEN PREPARED BY COOKING AN AQUEOUS SUSPENSION OF SAID STARCH WITH THE ALKALI METAL ALUMINATE AT A TEMPERATURE OF AT LEAST 60*C. AND LESS THAN 100*C., FOR AT LEAST SUFFICIENT TIME FOR THE VISCOSITY OF SAID SUSPENSION TO REACH 75% OF ITS MAXIMUM.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |