US2862922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making sodium cellulose sulfate
Assignee: Kimberly Clark Tissue Co
•
Filing: 1954-07-20
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Granted: 1958-12-02
•
Expires: 1974-07-20
Abstract
No abstract record available.
Inventors
- 👤 Donald B Sparrow
- 👤 William R Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:26
CPC Classifications
C; C08; C08B; C08B5/00; C08B5/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
THE METHOD OF MAKING SODIUM CELULOSE SULFATE WHICH COMPRISES REACTING CELLULOSE WITH SODIUM CHLORSULFONATE IN AN ANHYDROUS MEDIUM CONSISTING OF A MIXTURE OF ACETIC ANHYDRIDE AND GLACIAL ACETIC ACID.
Claim 2
Independent Claim
29 words
THE METHOD OF MAKING SODIUM CELULOSE SULFATE WHICH COMPRISES REACTING CELLULOSE WITH SODIUM CHLORSULFONATE IN AN ANHYDROUS MEDIUM CONSISTING OF A MIXTURE OF ACETIC ANHYDRIDE AND GLACIAL ACETIC ACID.
References Cited (Backward Citations)
GB303493A
Cited
US1866532A
Cited
US2290167A
Cited
US2686779A
Cited
US2675377A
Cited
US2714591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |