Patent US2845416A successfully refreshed from Google Patents.
US2845416A
Expired / Lapsed
US
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Method of aging a viscose solution
Assignee: Akzona Inc
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Filing: 1953-09-04
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Granted: 1958-07-29
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Expires: 1973-09-04
Abstract
No abstract record available.
Inventors
- 👤 Elling Hugo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:30
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE METHOD OF AGING A VISCOSE SPINNING SOLUTION WHILE FEEDING THE SAME TO A SPINNING MACHINE IN A DEAERATED CONDITION THROUGH A CLOSED SYSTEM COMPRISING THE STEPS OF MAINTAINING A SUPPLY OF AT LEAST PARTIALLY DISSOLVED CELLULOSE XANTHATE IN A PLURALITY OF DISSOLVING TANKS, PUMPING THE SOLUTION FROM THE DISSOLVING TANKS THROUGH A CONTINUOUSLY FILLED CONDUIT SYSTEM TO A DEAERATION VESSEL WHILE BLENDING THE SAME, DEAERATING THE SOLUTION, REMOVING THE SOLUTION FROM THE DEAREATION VESSEL AND PUMPING THE SAME THROUGH ANOTHER CONTINUOUSLY FILLED CONDUIT SYSTEM TO A SERIES OF COMPLETELY FILLED STORAGE TANKS AND FILTERS, PASSING THE SOLUTION ALTERNATELY THROUGH SAID STORAGE TANKS AND FILTERS FOR A SUFFICIENT LENGTH OF
Claim 2
Independent Claim
110 words
THE METHOD OF AGING A VISCOSE SPINNING SOLUTION WHILE FEEDING THE SAME TO A SPINNING MACHINE IN A DEAERATED CONDITION THROUGH A CLOSED SYSTEM COMPRISING THE STEPS OF MAINTAINING A SUPPLY OF AT LEAST PARTIALLY DISSOLVED CELLULOSE XANTHATE IN A PLURALITY OF DISSOLVING TANKS, PUMPING THE SOLUTION FROM THE DISSOLVING TANKS THROUGH A CONTINUOUSLY FILLED CONDUIT SYSTEM TO A DEAERATION VESSEL WHILE BLENDING THE SAME, DEAERATING THE SOLUTION, REMOVING THE SOLUTION FROM THE DEAREATION VESSEL AND PUMPING THE SAME THROUGH ANOTHER CONTINUOUSLY FILLED CONDUIT SYSTEM TO A SERIES OF COMPLETELY FILLED STORAGE TANKS AND FILTERS, PASSING THE SOLUTION ALTERNATELY THROUGH SAID STORAGE TANKS AND FILTERS FOR A SUFFICIENT LENGTH OF
References Cited (Backward Citations)
US1357947A
Cited
US1357946A
Cited
US1895192A
Cited
US1877337A
Cited
US2087016A
Cited
US2391973A
Cited
US2509267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |