US3007919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous viscose degasification
Assignee: Akzo Nobel UK PLC
•
Filing: 1959-10-05
•
Granted: 1961-11-07
•
Expires: 1979-10-05
Abstract
No abstract record available.
Inventors
- 👤 Clement B Hoskins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:22
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A METHOD OF DEAERATING VISCOSE PRIOR TO EXTRUSION INCLUDING THE STEPS OF SUBJECTING THE VISCOSE TO A HIGH VACUUM IN A FIRST CHAMBER WHEREBY THE VISCOSE IS CAUSED TO BOIL AND A MAJOR PORTION OF THE ENTRAPPED GAS BUBBLES ARE EVACUATED THEREFROM, CONTINUOUSLY TRANSFERRING THE VISCOSE TO A SECOND CHAMBER WHILE THE VISCOSE IS STILL IN A BOILING CONDITION, SUBJECTING THE VISCOSE TO ATMOSPHERIC PRESSURE WITHIN SAID SECOND CHAMBER WHEREBY RESIDUAL GASES ARE FREE TO ESCAPE FROM THE VISCOSE AND INTO THE ATMOSPHERE, MAINTAINED THE VISCOSE IN SAID SECOND CHAMBER UNTIL BOILING OF THE VISCOSE STOPS, AND DELIVERING THE VISCOSE DIRECTLY FROM SAID SECOND CHAMBER TO AN EXTRUSION MACHINE.
Claim 2
Independent Claim
109 words
A METHOD OF DEAERATING VISCOSE PRIOR TO EXTRUSION INCLUDING THE STEPS OF SUBJECTING THE VISCOSE TO A HIGH VACUUM IN A FIRST CHAMBER WHEREBY THE VISCOSE IS CAUSED TO BOIL AND A MAJOR PORTION OF THE ENTRAPPED GAS BUBBLES ARE EVACUATED THEREFROM, CONTINUOUSLY TRANSFERRING THE VISCOSE TO A SECOND CHAMBER WHILE THE VISCOSE IS STILL IN A BOILING CONDITION, SUBJECTING THE VISCOSE TO ATMOSPHERIC PRESSURE WITHIN SAID SECOND CHAMBER WHEREBY RESIDUAL GASES ARE FREE TO ESCAPE FROM THE VISCOSE AND INTO THE ATMOSPHERE, MAINTAINED THE VISCOSE IN SAID SECOND CHAMBER UNTIL BOILING OF THE VISCOSE STOPS, AND DELIVERING THE VISCOSE DIRECTLY FROM SAID SECOND CHAMBER TO AN EXTRUSION MACHINE.
References Cited (Backward Citations)
US277615A
Cited
GB209439A
Cited
US1876755A
Cited
US1910058A
Cited
US2183763A
Cited
US2355057A
Cited
US2578568A
Cited
GB726805A
Cited
GB722877A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |