US2802715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the boiling-off and bucking of cellulose fibers in aqueous alkaline solution containing r-(oc2h4)nu och2 coom compounds
Assignee: Saul and Co
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Filing: 1954-05-03
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Granted: 1957-08-13
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Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Hofer Kurt
- 👤 Hemmi Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:00
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/235; C07C59/305; C11; C11D; C11D1/00; C11D1/02; C11D1/04; C11D1/06; D; D06; D06M; D06M11/00; D06M11/32; D06M11/36; D06M11/38; D06M13/00; D06M13/10; D06M13/184; D06M13/207; D06M13/217; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/6131; D06P1/6133; D06P1/6135
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A BUCKING PROCESS FOR CLEANING GRAY CELLULOSE FIBERS, WHICH COMPRISES WASHING THE GRAY CELLULOSE FIBERS AT TEMPERATURES OF 75 TO 140*C. WITH AN AQUEOUS ALKALINE SOLUTION OF 0.5 TO 10*BE. CONTAINING AS THE ESSENTIAL ALKALINE INGREDIENT A MEMBER SELECTED FROM THE GROUP CONSISTING OF CAUSTIC SODA, CAUSTIC POTASH, SODIUM CARBONATE AND POTASSIUM CARBONATE, AND AS ANOTHER ESSENTIAL INGREDIENTT A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
63 words
A BUCKING PROCESS FOR CLEANING GRAY CELLULOSE FIBERS, WHICH COMPRISES WASHING THE GRAY CELLULOSE FIBERS AT TEMPERATURES OF 75 TO 140*C. WITH AN AQUEOUS ALKALINE SOLUTION OF 0.5 TO 10*BE. CONTAINING AS THE ESSENTIAL ALKALINE INGREDIENT A MEMBER SELECTED FROM THE GROUP CONSISTING OF CAUSTIC SODA, CAUSTIC POTASH, SODIUM CARBONATE AND POTASSIUM CARBONATE, AND AS ANOTHER ESSENTIAL INGREDIENTT A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2183853A
Cited
US2340977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |