US2668761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cellulose
Assignee: Acordis UK Ltd
•
Filing: 1950-04-27
•
Granted: 1954-02-09
•
Expires: 1970-04-27
Abstract
No abstract record available.
Inventors
- 👤 Bate Stanley Charles
- 👤 Rogerson Walter Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
CPC Classifications
D; D21; D21C; D21C3/00; D21C3/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
PROCESS FOR PRODUCING CELLULOSE FROM LIGNOCELLULOSE MATERIAL, WHICH COMPRISES HEATING LIGNO-CELLULOSE MATERIAL TO A TEMPERATURE BETWEEN 120* AND 150* C. WITH AN ANHYDROUS HOMOGENEOUS LIQUID MIXTURE OF A CHLORINATED FATTY ACID CONTAINING UP TO THREE CARBON ATOMS IN THE MOLECULE AND AN ORGANIC DILUENT INERT TO THE CHLORINATED FATTY ACID, THE CONCENTRATION OF THE CHLORINATED FATTY ACID IN THE MIXTURE BEING 45-85% BY WEIGHT.
Claim 2
Dependent Claim
64 words
PROCESS FOR PRODUCING CELLULOSE FROM LIGNOCELLULOSE MATERIAL, WHICH COMPRISES HEATING LIGNO-CELLULOSE MATERIAL TO A TEMPERATURE BETWEEN 120* AND 150* C. WITH AN ANHYDROUS HOMOGENEOUS LIQUID MIXTURE OF A CHLORINATED FATTY ACID CONTAINING UP TO THREE CARBON ATOMS IN THE MOLECULE AND AN ORGANIC DILUENT INERT TO THE CHLORINATED FATTY ACID, THE CONCENTRATION OF THE CHLORINATED FATTY ACID IN THE MIXTURE BEING 45-85% BY WEIGHT.
References Cited (Backward Citations)
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US117134A
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US1806703A
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US962173A
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US2022654A
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US2061616A
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US2538457A
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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) | 1957-02-08 | 1957-08-10 | 1958-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-08 | 1961-08-10 | 1962-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-08 | 1965-08-10 | 1966-02-09 | $7700.00 | Window Closed / Lapsed |