Patent US1053267A successfully refreshed from Google Patents.
Patent US2858304A successfully refreshed from Google Patents.
US2858304A
Expired / Lapsed
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Alkali cellulose aging
Assignee: Celanese Corp
•
Filing: 1954-01-13
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Granted: 1958-10-28
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Expires: 1974-01-13
Abstract
No abstract record available.
Inventors
- 👤 William H Bradshaw
- 👤 Addison H Lynch
- 👤 Edward H Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:14
CPC Classifications
C; C08; C08B; C08B1/00; C08B1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
PROCESS FOR THE PRODUCTION OF AGED ALKALI CELLULOSE, WHICH COMPRISES MIXING CELLULOSE, AQUEOUS ALKALI AND AN EMULSIFYING AGENT TO FORM A SLURRY AND SUBJECTING A MIXTURE OF SAID SLURRY AND AN OXYGEN-CONTAINING GAS TO AGITATION TO FORM A UNIFROM DISPERSION OF BUBBLES OF SAID GAS IN SAID SLURRY.
Claim 2
Dependent Claim
48 words
PROCESS FOR THE PRODUCTION OF AGED ALKALI CELLULOSE, WHICH COMPRISES MIXING CELLULOSE, AQUEOUS ALKALI AND AN EMULSIFYING AGENT TO FORM A SLURRY AND SUBJECTING A MIXTURE OF SAID SLURRY AND AN OXYGEN-CONTAINING GAS TO AGITATION TO FORM A UNIFROM DISPERSION OF BUBBLES OF SAID GAS IN SAID SLURRY.
References Cited (Backward Citations)
US1733393A
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US2542492A
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GB653695A
Cited
US2647114A
Cited
US2592355A
Cited
US2739879A
Cited
US2680738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |