US2597624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating cellulosic materials
Assignee: TEXTILE and CHEM RES CO Ltd
•
Filing: 1950-03-20
•
Granted: 1952-05-20
•
Expires: 1970-03-20
Abstract
No abstract record available.
Inventors
- 👤 Drisch Nicolas
- 👤 Petiton Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:22
CPC Classifications
C; C08; C08B; C08B15/00; C08B15/005; C08L; C08L1/00; D; D01; D01F; D01F11/00; D01F11/02; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS FOR PRODUCING COLORLESS ARTIFICIAL REGENERATED CELLULOSE FILAMENTS WITH REDUCED SWELLING CHARACTERISTICS, WHICH COMPRISES INCORPORATING IN A VISCOSE SPINNING SOLUTION, A PARTLY CONDENSED LINEAR POLYESTER OF AN ALIPHATIC DIACID AND A POLYALCOHOL WHICH IS SOLUBLE IN DILUTE SODA, SPINNING SAID SOLUTION INTO A FILAMENT AND REACTING THE SPUN FILAMENT BY TREATMENT AT 80* C. TO 90* C. WITH NOT OVER 10 G. PER LITER OF FORMALDEHYDE AND AN ACID CATALYST.
Claim 2
Dependent Claim
71 words
THE PROCESS FOR PRODUCING COLORLESS ARTIFICIAL REGENERATED CELLULOSE FILAMENTS WITH REDUCED SWELLING CHARACTERISTICS, WHICH COMPRISES INCORPORATING IN A VISCOSE SPINNING SOLUTION, A PARTLY CONDENSED LINEAR POLYESTER OF AN ALIPHATIC DIACID AND A POLYALCOHOL WHICH IS SOLUBLE IN DILUTE SODA, SPINNING SAID SOLUTION INTO A FILAMENT AND REACTING THE SPUN FILAMENT BY TREATMENT AT 80* C. TO 90* C. WITH NOT OVER 10 G. PER LITER OF FORMALDEHYDE AND AN ACID CATALYST.
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |