US3234995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating an amorphous polymer from a solution thereof
Assignee: Stamicarbon BV
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Filing: 1962-03-27
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Granted: 1966-02-15
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Expires: 1982-03-27
Abstract
No abstract record available.
Inventors
- 👤 Cornelis E P V Van Den Berg
- 👤 Gerardus J A Scheers
- 👤 Pulles Theodorus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:36
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/14; B; B04; B04C; B04C5/00; B04C5/20; C08C; C08C2/00; C08C2/06; C08F; C08F10/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S203/00; Y10S203/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PROCESS FOR SEPARATING AN AMORPHOUS POLYMER FROM A SOLUTION THEREOF COMPRISING BRINGING THE SOLUTION INTO CONTACT WITH A SOLID ROTATING BODY OF HOT WATER IN A ROTATION CHAMBER, SAID WATER SUBSTANTIALLY FILLING SAID CHAMBER AND BEING FORCED THEREINTO IN A DIRECTION AND UNDER A PRESSURE SO THAT IT PASSES THROUGH THE CHAMBER IN A ROTATORY CURRENT HAVING AN AXIS OF ROTATION AT THE CENTER OF SAID CHAMBER, SAID SOLUTION BEING BOTH ADMITTED INTO THE ROTATION CHAMBER AND BEING WITHDRAWN THEREFROM AT OPPOSITE ENDS THEREOF AT APPROXIMATELY THE AXIS OF THE ROTATORY CURRENT WHEREBY SAID POLYMER FOLLOWS SUBSTANTIALLY ALONG THE AXIS OF THE ROTATORY CURRENT ON PASSING THROUGH SAID CHAMBER, THE TEMPERATURE OF SAID WATER BEING SUCH AS TO EVAPORATE THE SOLVET FROM SAID SOLUTION, CONTINUOUSLY DISCHARGING THE CONTENTS OF SAID CHAMBER FROM SAID CHAMBER AND SEPARATING THE POLYMER, THE WATER AND THE VAPORS OF THE SOLVENT FROM EACH OTHER.
Claim 2
Dependent Claim
150 words
A PROCESS FOR SEPARATING AN AMORPHOUS POLYMER FROM A SOLUTION THEREOF COMPRISING BRINGING THE SOLUTION INTO CONTACT WITH A SOLID ROTATING BODY OF HOT WATER IN A ROTATION CHAMBER, SAID WATER SUBSTANTIALLY FILLING SAID CHAMBER AND BEING FORCED THEREINTO IN A DIRECTION AND UNDER A PRESSURE SO THAT IT PASSES THROUGH THE CHAMBER IN A ROTATORY CURRENT HAVING AN AXIS OF ROTATION AT THE CENTER OF SAID CHAMBER, SAID SOLUTION BEING BOTH ADMITTED INTO THE ROTATION CHAMBER AND BEING WITHDRAWN THEREFROM AT OPPOSITE ENDS THEREOF AT APPROXIMATELY THE AXIS OF THE ROTATORY CURRENT WHEREBY SAID POLYMER FOLLOWS SUBSTANTIALLY ALONG THE AXIS OF THE ROTATORY CURRENT ON PASSING THROUGH SAID CHAMBER, THE TEMPERATURE OF SAID WATER BEING SUCH AS TO EVAPORATE THE SOLVET FROM SAID SOLUTION, CONTINUOUSLY DISCHARGING THE CONTENTS OF SAID CHAMBER FROM SAID CHAMBER AND SEPARATING THE POLYMER, THE WATER AND THE VAPORS OF THE SOLVENT FROM EACH OTHER.
References Cited (Backward Citations)
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |