US2982598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cellulose triacetate textile materials
Assignee: Acordis UK Ltd
•
Filing: 1956-12-05
•
Granted: 1961-05-02
•
Expires: 1976-12-05
Abstract
No abstract record available.
Inventors
- 👤 Downing John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:20
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28; D01F2/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN A PROCESS FOR THE MANUFACTURE OF CELLULOSE TRIACETATE FILAMENTARY MATERIALS BY DRY SPINNING WHEREIN A SOLUTION OF THE CELLULOSE TRIACETATE IN A SOLVENT CONSISTING OF 88-100% BY WEIGHT OF METHYLENE CHLORIDE AND 12-0% BY WEIGHT OF AN UNSUBSTITUTED MONOHYDRIC ALCOHOL HAVING AT MOST TWO CARBON ATOMS IN THE MOLECULE IS EXTRUDED INTO A CURRENT OF AIR OVER A PERIOD DURING WHICH THE ABSOLUTE HUMIDITY OF THE AMBIENT AIR EXCEEDS A HEREINBELOW DEFINED CRITICAL MAXIMUM AT LEAST A PORTION OF THE TIME, THE IMPROVEMENT WHICH COMPRISES ADJUSTING THE ABSOLUTE HUMIDITY OF THE EVAPORATIVE MEDIUM IN THE NEIGHBOURHOOD OF THE POINT OF EXTRUSION TO A VALUE OF AT MOST SAID CRITICAL MAXIMUM WHICH IS LINEARLY RELATED TO THE
Claim 2
Dependent Claim
117 words
IN A PROCESS FOR THE MANUFACTURE OF CELLULOSE TRIACETATE FILAMENTARY MATERIALS BY DRY SPINNING WHEREIN A SOLUTION OF THE CELLULOSE TRIACETATE IN A SOLVENT CONSISTING OF 88-100% BY WEIGHT OF METHYLENE CHLORIDE AND 12-0% BY WEIGHT OF AN UNSUBSTITUTED MONOHYDRIC ALCOHOL HAVING AT MOST TWO CARBON ATOMS IN THE MOLECULE IS EXTRUDED INTO A CURRENT OF AIR OVER A PERIOD DURING WHICH THE ABSOLUTE HUMIDITY OF THE AMBIENT AIR EXCEEDS A HEREINBELOW DEFINED CRITICAL MAXIMUM AT LEAST A PORTION OF THE TIME, THE IMPROVEMENT WHICH COMPRISES ADJUSTING THE ABSOLUTE HUMIDITY OF THE EVAPORATIVE MEDIUM IN THE NEIGHBOURHOOD OF THE POINT OF EXTRUSION TO A VALUE OF AT MOST SAID CRITICAL MAXIMUM WHICH IS LINEARLY RELATED TO THE
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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) | 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 |