Patent US4160192A successfully refreshed from Google Patents.
Patent US3144298A successfully refreshed from Google Patents.
US3144298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating cellulosic materials and product thereby formed
Assignee: Cerestar USA Inc
•
Filing: 1959-10-27
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Granted: 1964-08-11
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Expires: 1979-10-27
Abstract
No abstract record available.
Inventors
- 👤 Clifford H Hullinger
- 👤 Rene R Carrasco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:28
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
THE METHOD OF TREATING CELLULOSIC MATERIAL WHICH COMPRISES THE STEPS OF FORMING AN AQUEOUS PHYSICAL MIXTURE CONTAINING FROM AOUT 1.0% TO ABOUT 50.0% BY WEIGHT OF STARCH HAVING AT LEAST ONE FREE HYDROXYL GROUP, FROM ABOUT 1.0% TO ABOUT 20.0% OF AN ALKALI METAL SALT OF TRIMETAPHOSPHORIC ACID BASED ON THE WEIGHT OF THE STARCH AND SUFFICIENT ALKALI TO CATALYZE REACTION BETWEEN THE SALT AND THE STARCH, AND THEN APPLYING THE PHYSICAL MIXTURE TO CELLULOSIC MATERIAL BEFORE ANY SUBSTANTIAL RECTION HS TAKEN PLACE BETWEEN THE INGREDIENTS THEREOF; MAINTAINING THE MIXTURE IN SITU UPON THE CELLULOSIC MATERIAL WHILE CAUSING REACTION TO TAKE PLACE BETWEEN THE STARCH AND THE ALKALI METAL SALT BY HEATING THE MIXTURE TO A TEMPERATURE FROM ABOUT 100*F. TO ABOUT 300* F. IN ORDER TO FORM A BOND WITH THE CELLULOSIC MATERIAL AND INCREASE THE WET STRENGTH OF THE CELLULOSIC MATERIAL.
Claim 2
Independent Claim
143 words
THE METHOD OF TREATING CELLULOSIC MATERIAL WHICH COMPRISES THE STEPS OF FORMING AN AQUEOUS PHYSICAL MIXTURE CONTAINING FROM AOUT 1.0% TO ABOUT 50.0% BY WEIGHT OF STARCH HAVING AT LEAST ONE FREE HYDROXYL GROUP, FROM ABOUT 1.0% TO ABOUT 20.0% OF AN ALKALI METAL SALT OF TRIMETAPHOSPHORIC ACID BASED ON THE WEIGHT OF THE STARCH AND SUFFICIENT ALKALI TO CATALYZE REACTION BETWEEN THE SALT AND THE STARCH, AND THEN APPLYING THE PHYSICAL MIXTURE TO CELLULOSIC MATERIAL BEFORE ANY SUBSTANTIAL RECTION HS TAKEN PLACE BETWEEN THE INGREDIENTS THEREOF; MAINTAINING THE MIXTURE IN SITU UPON THE CELLULOSIC MATERIAL WHILE CAUSING REACTION TO TAKE PLACE BETWEEN THE STARCH AND THE ALKALI METAL SALT BY HEATING THE MIXTURE TO A TEMPERATURE FROM ABOUT 100*F. TO ABOUT 300* F. IN ORDER TO FORM A BOND WITH THE CELLULOSIC MATERIAL AND INCREASE THE WET STRENGTH OF THE CELLULOSIC MATERIAL.
References Cited (Backward Citations)
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Cited
US2197463A
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US2524400A
Cited
US2884412A
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US2801242A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |