US2774441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for the degassing of viscose
Assignee: Akzona Inc
•
Filing: 1953-11-30
•
Granted: 1956-12-18
•
Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 Buurman Aart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:56
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/10; D01D1/103; B; B01; B01D; B01D19/00; B01D19/0042; D01F; D01F2/00; D01F2/06; Y; Y10; Y10S; Y10S159/00; Y10S159/04; Y10S159/31
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
THE METHOD OF DEGASSING SPINNING SOLUTIONS THAT COMPRISES, PASSING SUCCEEDING VOLUMES OF A SPINNING SOLUTION UPWARDLY THROUGH A COLUMN AND SPILLING THE SAME INTO A ZONE AT THE TOP OF THE COLUMN WHILE ADJUSTING THE TEMPERTURE OF THE VISCOSE ENTERING THE COLUMN AND THE PRESSURE IN SAID ZONE TO CAUSE BOILING TO OCCUR IN THE COLUMN BUT TO TERMINATE BEFORE THE SOLUTION SPILLS INTO SAID ZONE AND RECOVERING THE DEGASSED SOLUTION FROM SAID ZONE.
References Cited (Backward Citations)
US414618A
Cited
US863031A
Cited
US1529884A
Cited
US847085A
Cited
US1581371A
Cited
US2006985A
Cited
US1926191A
Cited
US1752215A
Cited
US2355057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |