US2792313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of cellulose
Assignee: International Paper Canada Inc
•
Filing: 1956-09-27
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Granted: 1957-05-14
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Expires: 1976-09-27
Abstract
No abstract record available.
Inventors
- 👤 Charles Frank Roland
- 👤 Wayman Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:20
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62; D01; D01F; D01F2/00; D01F2/06; D01F2/08; D01F2/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE MANUFACTURE OF REGENERATED CELLULOSE PRODUCTS BY THE VISCOSE PROCESS, THE STEP OF INCORPORATING INTO VISCOSE POLYOXYETHYLENE ESTERS DERIVED FROM THE GROUP CONSISTING OF ABIETIC AND HYDROABIETIC ACIDS WHEREIN THE NUMBER OF ETHYLENE OXIDE UNITS IN THE POLYOXYETHYLENE PORTIONS OF THE MOLEUCLES OF SAID ESTERS ARE FROM 12 TO 100, SAID ESTERS BEING ADDED IN AN AMOUNT FROM 0.01% TO 0.2% BASED ON THE WEIGHT OF THE CELLULOSE CONTENT OF THE VISCOSE.
Claim 2
Dependent Claim
73 words
IN THE MANUFACTURE OF REGENERATED CELLULOSE PRODUCTS BY THE VISCOSE PROCESS, THE STEP OF INCORPORATING INTO VISCOSE POLYOXYETHYLENE ESTERS DERIVED FROM THE GROUP CONSISTING OF ABIETIC AND HYDROABIETIC ACIDS WHEREIN THE NUMBER OF ETHYLENE OXIDE UNITS IN THE POLYOXYETHYLENE PORTIONS OF THE MOLEUCLES OF SAID ESTERS ARE FROM 12 TO 100, SAID ESTERS 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)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |