US2982765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuously admixing alkali cellulose with etherifying agents
Assignee: Henkel AG and Co KGaA
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Filing: 1958-06-23
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Granted: 1961-05-02
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Expires: 1978-06-23
Abstract
No abstract record available.
Inventors
- 👤 Grun Hans-Hellmut
- 👤 Schmidt Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:57
CPC Classifications
C; C08; C08B; C08B17/00; C08B17/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PRODUCING CELLULOSE ETHERS FROM ALKALI CELLULOSE AND ETHERIFYING AGENTS WHICH COMPRISES SUSPENDING SHREDDED ALKALI CELLULOSE PARTICLES IN A MOVING GASEOUS SUSPENDING MEDIUM, ADDING THE ETHERIFYING AGENT IN FINELY DIVIDED FORM THERETO, AGITATING THE ALKALI CELLULOSE PARTICLES AND ETHERIFYING AGENT TOGETHER WHILE SUSPENDED IN SAID GAS STREAM AND THEN PASSING THE MIXED ALKALI CELLULOSE AND ETHERIFYING AGENT THROUGH A MECHANICAL MIXER.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PRODUCING CELLULOSE ETHERS FROM ALKALI CELLULOSE AND ETHERIFYING AGENTS WHICH COMPRISES SUSPENDING SHREDDED ALKALI CELLULOSE PARTICLES IN A MOVING GASEOUS SUSPENDING MEDIUM, ADDING THE ETHERIFYING AGENT IN FINELY DIVIDED FORM THERETO, AGITATING THE ALKALI CELLULOSE PARTICLES AND ETHERIFYING AGENT TOGETHER WHILE SUSPENDED IN SAID GAS STREAM AND THEN PASSING THE MIXED ALKALI CELLULOSE AND ETHERIFYING AGENT THROUGH A MECHANICAL MIXER.
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |