US2664360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cellulose
Assignee: International Paper Canada Inc
•
Filing: 1951-08-20
•
Granted: 1953-12-29
•
Expires: 1971-08-20
Abstract
No abstract record available.
Inventors
- 👤 Frank R Charles
- 👤 Julian A Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:47
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; D01F2/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
IN THE MANUFACTURE OF REGENERATED CELLULOSE PRODUCTS BY THE VISCOSE PROCESS, THE STEP OF INEORPORATING INTO VISCOSE ETHENOXY N-MONOETHANOLAMIDES OF REFINED TALL OIL WHEREIN THE NUMBER OF ETHYLENE OXIDE UNITS IS FROM 4 TO 50 PER AMIDE MOLECULE, SAID REFINED TALL OIL BEFORE CONDENSATION CONSISTING APPROXIMATELY OF 33% ABIETIC ACID, 5% UNSAPONIFIABLE MATERIALS AND THE BALANCE OF FATTY ACIDS, GENERALLY UNSATURATED OF 18 CARBON ATOMS, SAID AMIDES BEING ADDED IN AN AMOUNT FROM 0.01% TO 0.2% BASED ON THE WEIGHT OF THE CELLULOSE CONTENT OF THE VISCOSE.
References Cited (Backward Citations)
US1970578A
Cited
US2002613A
Cited
US2331935A
Cited
US2393817A
Cited
US2432128A
Cited
US2423469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |