US2925412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of organic substances of very high molecular weight
Assignee: Acordis UK Ltd
•
Filing: 1954-03-18
•
Granted: 1960-02-16
•
Expires: 1974-03-18
Abstract
No abstract record available.
Inventors
- 👤 Johnston David Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:54
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/22; C08B3/26; C08B3/28; Y; Y10; Y10S; Y10S260/00; Y10S260/22; Y10S264/00; Y10S264/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
PROCESS FOR THE PRECIPITATION OF A CELLULOSE ESTER OF AT LEAST ONE LOWER FATTY ACID HAVING 2-4 CARBON ATOMS IN THE MOLECULE FROM SOLUTION IN A SOLVENT WHICH IS A LIQUID AT ORDINARY TEMPERATURES, WHICH COMPRISES CAUSING AN UNSUPPORTED STREAM OF THE SOLUTION, AND AT LEAST ONE UNSATURATED STREAM OF A PRECIPITANT FLOWING PARALLEL TO AND IN CONTACT WITH THE STREAM OF SOLUTION IN SUCH A WAY THAT THE STREAM OF SOLUTION IS SUBSTANTIALLY COMPELETLY SURROUNDED BY PRECIPITANT, TO IMPINGE ON A SOLID IMPACT SURFACE, WHEREBY THE SAID STREAMS OF SOLUTION AND PRECIPITANT ARE RAPIDLY AND INTIMATELY MIXED.
Claim 2
Dependent Claim
98 words
PROCESS FOR THE PRECIPITATION OF A CELLULOSE ESTER OF AT LEAST ONE LOWER FATTY ACID HAVING 2-4 CARBON ATOMS IN THE MOLECULE FROM SOLUTION IN A SOLVENT WHICH IS A LIQUID AT ORDINARY TEMPERATURES, WHICH COMPRISES CAUSING AN UNSUPPORTED STREAM OF THE SOLUTION, AND AT LEAST ONE UNSATURATED STREAM OF A PRECIPITANT FLOWING PARALLEL TO AND IN CONTACT WITH THE STREAM OF SOLUTION IN SUCH A WAY THAT THE STREAM OF SOLUTION IS SUBSTANTIALLY COMPELETLY SURROUNDED BY PRECIPITANT, TO IMPINGE ON A SOLID IMPACT SURFACE, WHEREBY THE SAID STREAMS OF SOLUTION AND PRECIPITANT ARE RAPIDLY AND INTIMATELY MIXED.
References Cited (Backward Citations)
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Cited
US2702280A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |