US2558066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkali cellulose
Assignee: Akzo Nobel UK PLC
•
Filing: 1946-08-21
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Granted: 1951-06-26
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Expires: 1966-08-21
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Wedler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:03
CPC Classifications
C; C08; C08B; C08B1/00; C08B1/08; C08B1/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
METHOD OF PRODUCING ALKALI CELLULOSE OF SUBSTANTIALLY UNIFORM COMPOSITION WHICH COMPRISES FORMING A SLURRY OF PRESSED CELLULOSIC PULP IN AN AQUEOUS ALKALI SOLUTION, PASSING THE SLURRY THROUGH A FIELD OF SOUND WAVES HAVING A FREQUENCY OF AT LEAST 1000 CYCLES PER SECOND AND THEN REMOVING THE IMPREGNATED PULP AS SUCH FROM THE SOUND WAVE FIELD.
References Cited (Backward Citations)
CA423382A
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US1858017A
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US2005811A
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US2138051A
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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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |