US3038778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of viscose rayon
Assignee: Akzona Inc
•
Filing: 1958-06-06
•
Granted: 1962-06-12
•
Expires: 1978-06-06
Abstract
No abstract record available.
Inventors
- 👤 Berthold H Daimler
- 👤 Elling Hugo
- 👤 Elssner Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:13
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/223; D01; D01F; D01F11/00; D01F11/02; D01F2/00; D01F2/06; D01F2/08; Y; Y10; Y10S; Y10S264/00; Y10S264/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR PRODUCING HIGH STRENGTH VISCOSE THREADS COMPRISING EXTRUDING A VISCOSE SOLUTION INTO AN AQUEOUS ACIDIC COAGULATING AND REGENERATING FIRST BATH CONTAINING SALTS TO FORM VISCOSE THREADS THEREFROM, WITHDRAWING THE THUS-FORMED THREADS FROM SAID FIRST BATH, PASSING SAID THREADS THROUGH A COLD AQUEOUS INTERMEDIATE BATH MAINTAINED AT A TEMPERATURE OF 15-35* C. BUT SUBSTANTIALLY LOWER THAN THE TEMPERATURE OF SAID FIRST BATH, WHEREBY THE SALT CONTENT OF THE LIQUID ENTRAINED IN SAID THREADS IS REDUCED BY THEIR CONTACT WITH SAID INTERMEDIATE BATH, AND PASSING SAID THREADS INTO A HOT SECOND BATH MAINTAINED AT A TEMPERATURE SUBSTANTIALLY HIGHER THAN THE TEMPERATURE OF SAID FIRST BATH WHEREIN SAID THREADS ARE GIVEN A SUBSTANTIALLY STRETCH.
Claim 2
Dependent Claim
113 words
A PROCESS FOR PRODUCING HIGH STRENGTH VISCOSE THREADS COMPRISING EXTRUDING A VISCOSE SOLUTION INTO AN AQUEOUS ACIDIC COAGULATING AND REGENERATING FIRST BATH CONTAINING SALTS TO FORM VISCOSE THREADS THEREFROM, WITHDRAWING THE THUS-FORMED THREADS FROM SAID FIRST BATH, PASSING SAID THREADS THROUGH A COLD AQUEOUS INTERMEDIATE BATH MAINTAINED AT A TEMPERATURE OF 15-35* C. BUT SUBSTANTIALLY LOWER THAN THE TEMPERATURE OF SAID FIRST BATH, WHEREBY THE SALT CONTENT OF THE LIQUID ENTRAINED IN SAID THREADS IS REDUCED BY THEIR CONTACT WITH SAID INTERMEDIATE BATH, AND PASSING SAID THREADS INTO A HOT SECOND BATH MAINTAINED AT A TEMPERATURE SUBSTANTIALLY HIGHER THAN THE TEMPERATURE OF SAID FIRST BATH WHEREIN SAID THREADS ARE GIVEN A SUBSTANTIALLY STRETCH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-11 | 1965-12-11 | 1966-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-11 | 1969-12-11 | 1970-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-11 | 1973-12-11 | 1974-06-12 | $7700.00 | Window Closed / Lapsed |