US2735846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkali cellulose
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
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Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:23
CPC Classifications
C; C08; C08B; C08B1/00; C08B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
THE METHOD FOR THE PRODUCTION OF SODA-CELLULOSE WHICH COMPRISES MIXING AND SHREDDING CELLULOSE PULP, IN BULK CONDITION, WITH A SODIUM HYDROXIDE SOLUTION THE AMOUNT AND CONCENTRATION OF WHICH IS CALCULATED TO PRODUCE A SODA-CELLULOSE OF PREDETERMINED CAUSTIC AND CELLULOSE CONTENT, TO PRODUCE AN INTIMATE PHYSICAL MIXTURE OF THE PULP AND SOLUTION, THE TEMPERATURE THROUGHOUT THE MIXING AND SHREDDING BEING MAINTAINED AT A VALUE OF AT LESS 30* C., REDUCING THE TEMPERATURE OF THE PHYSICAL MIXTURE TO A TEMPERATURE OF ABOUT 5* C. TO 25* C., AND MAINTAINING THE MASS AT THE REDUCED TEMPERATURE UNTIL A MASS OF SUBSTANTIALLY HOMOGENEOUS SODA-CELLULOSE IS OBTAINED.
Claim 2
Independent Claim
102 words
THE METHOD FOR THE PRODUCTION OF SODA-CELLULOSE WHICH COMPRISES MIXING AND SHREDDING CELLULOSE PULP, IN BULK CONDITION, WITH A SODIUM HYDROXIDE SOLUTION THE AMOUNT AND CONCENTRATION OF WHICH IS CALCULATED TO PRODUCE A SODA-CELLULOSE OF PREDETERMINED CAUSTIC AND CELLULOSE CONTENT, TO PRODUCE AN INTIMATE PHYSICAL MIXTURE OF THE PULP AND SOLUTION, THE TEMPERATURE THROUGHOUT THE MIXING AND SHREDDING BEING MAINTAINED AT A VALUE OF AT LESS 30* C., REDUCING THE TEMPERATURE OF THE PHYSICAL MIXTURE TO A TEMPERATURE OF ABOUT 5* C. TO 25* C., AND MAINTAINING THE MASS AT THE REDUCED TEMPERATURE UNTIL A MASS OF SUBSTANTIALLY HOMOGENEOUS SODA-CELLULOSE IS OBTAINED.
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |