Patent US2737372A successfully refreshed from Google Patents.
US2737372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing apparatus
Assignee: North American Rayon Corp
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Filing: 1952-05-09
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Granted: 1956-03-06
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Expires: 1972-05-09
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:33
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/02; D01F; D01F2/00; D01F2/06; D01F2/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
206 words
AN APPARATUS FOR DISSOLVING CELLULOSE XANTHATE TO PRODUCE VISCOSE COMPRISING IN COMBINATION A TANK FOR HOLDING AN AQUEOUS SOLUTION FOR DISSOLVING CELLULOSE XANTHATE, AN IMPELLER MIXER PUMP AND HOUSING THEREFOR POSITIONED IN THE BOTTOM OF SAID TANK, A FUNNEL SHAPED TUBE COMPRISING A CELLULOSE XANTHATE WETTING CHAMBER HAVING THE BOTTOM THEREOF POSITIONED OVER THE MOUTH OF SAID PUMP HOUSING, SAID TUBE HAVING A MOUTH AT THE TOP THEREOF POSITIONED WELL BELOW THE TOP OF SAID TANK, MEANS FOR GRADUALLY DUMPING A PREDETERMINED CHARGE OF CELLULOSE XANTHATE INTO SAID TUBE THROUGH THE MOUTH THEREOF, SAID TANK BEING PARTIALLY FILLED WITH THE AQUEOUS SOLUTION TO A LEVEL SUBSTANTIALLY BELOW THE MOUTH OF SAID TUBE, SAID TUBE BEING PROVIDED WITH A PLURALITY OF HOLES FOR PASSING A LIMITED QUANTITY OF THE AQUEOUS SOLUTION INTO SAID TUBE SIMULTANEOUSLY AS SAID CHARGE OF XANTHATE IS DUMPED INTO SAID TUBE, THE NUMBER, SIZE AND DISTRIBUTION OF SAID HOLES BEING SUCH AS TO SUPPLY STREAMS OF THE AQUEOUS SOLUTION IN SAID TUBE TO MOISTEN THE CELLULOSE XANTHATE AS IT IS DUMPED INTO SAID TUBE, AND MEANS FOR DRIVING SAID IMPELLER MIXER PUMP FOR REDUCING THE MOISTENED CELLULOSE XANTHATE TO SMALL PARTICLES AND FORCING SAID SMALL PARTICLES INTO THE AQUEOUS SOLUTION IN SAID TANK.
Claim 2
Independent Claim
206 words
AN APPARATUS FOR DISSOLVING CELLULOSE XANTHATE TO PRODUCE VISCOSE COMPRISING IN COMBINATION A TANK FOR HOLDING AN AQUEOUS SOLUTION FOR DISSOLVING CELLULOSE XANTHATE, AN IMPELLER MIXER PUMP AND HOUSING THEREFOR POSITIONED IN THE BOTTOM OF SAID TANK, A FUNNEL SHAPED TUBE COMPRISING A CELLULOSE XANTHATE WETTING CHAMBER HAVING THE BOTTOM THEREOF POSITIONED OVER THE MOUTH OF SAID PUMP HOUSING, SAID TUBE HAVING A MOUTH AT THE TOP THEREOF POSITIONED WELL BELOW THE TOP OF SAID TANK, MEANS FOR GRADUALLY DUMPING A PREDETERMINED CHARGE OF CELLULOSE XANTHATE INTO SAID TUBE THROUGH THE MOUTH THEREOF, SAID TANK BEING PARTIALLY FILLED WITH THE AQUEOUS SOLUTION TO A LEVEL SUBSTANTIALLY BELOW THE MOUTH OF SAID TUBE, SAID TUBE BEING PROVIDED WITH A PLURALITY OF HOLES FOR PASSING A LIMITED QUANTITY OF THE AQUEOUS SOLUTION INTO SAID TUBE SIMULTANEOUSLY AS SAID CHARGE OF XANTHATE IS DUMPED INTO SAID TUBE, THE NUMBER, SIZE AND DISTRIBUTION OF SAID HOLES BEING SUCH AS TO SUPPLY STREAMS OF THE AQUEOUS SOLUTION IN SAID TUBE TO MOISTEN THE CELLULOSE XANTHATE AS IT IS DUMPED INTO SAID TUBE, AND MEANS FOR DRIVING SAID IMPELLER MIXER PUMP FOR REDUCING THE MOISTENED CELLULOSE XANTHATE TO SMALL PARTICLES AND FORCING SAID SMALL PARTICLES INTO THE AQUEOUS SOLUTION IN SAID TANK.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |