US3264263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate recovery system
Assignee: Bayer Corp
•
Filing: 1963-05-22
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Granted: 1966-08-02
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Expires: 1983-05-22
Abstract
No abstract record available.
Inventors
- 👤 Peter J Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:49
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/14; C08J2369/00; Y; Y10; Y10S; Y10S159/00; Y10S159/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A CONTINUOUS PROCESS FOR SEPARATING POLYCARBONATE FROM ITS SOLVENT IN A SOLUTION THEREOF TO FORM POLYCARBONATE HAVING HIGH IMPACT STRENGTH WHICH COMPRISES CONTINUOUSLY MIXING IN A MIXING MEANS A POLYCARBONATE SOLUTION AND A PRECIPITATING SOLUTION, SAID PRECIPITATING SOLUTION COMPRISING A POLYCARBONATE SOLVENT BEING MISCIBLE WITH BONATE NON-SOLVENT, SAID SOLVENT BEING MISCIBLE WITH AND HAVING A BOILING POINT LOWER THAN THE BOILING POINT OF THE NON-SOLVENT, TO FORM A MIXTURE COMPRISING FROM ABOUT 1 TO 15 PARTS BY WEIGHT OF PRECIPITATED POLYCABONATE, FROM ABOUT 35 TO 65 PARTS BY WEIGHT OF POLYCARBONATE SOLVENT AND FROM ABOUT 35 TO 65 PARTS BY WEIGHT POLYCARBONATE NON-SOLVENT, SEPARATING THE PRECIPITATED POLYCARBONATE FROM THE RESULTING MIXTURE, REMOVING FROM THE REMAINDER OF THE MIXTURE THE UNPRECIPITATED POLYCARBONATE AND SUBSEQUENTLY REMOVING THE REMAINDER OF THE MIXTURE THAT AMOUNT OF POLYCARBONATE SOLVENT WHICH WAS INITIALLY ADDED TO SAID MIXING MEANS VIA SAID POLYCARBONATE SOLUTION AND CONTINUOUSLY RECYCLING THE RESULTING SOLUTION TO SAID MIXING MEANS WHERE IT IS MIXED WITH FRESH POLYCARBONATE SOLUTION.
Claim 2
Dependent Claim
164 words
A CONTINUOUS PROCESS FOR SEPARATING POLYCARBONATE FROM ITS SOLVENT IN A SOLUTION THEREOF TO FORM POLYCARBONATE HAVING HIGH IMPACT STRENGTH WHICH COMPRISES CONTINUOUSLY MIXING IN A MIXING MEANS A POLYCARBONATE SOLUTION AND A PRECIPITATING SOLUTION, SAID PRECIPITATING SOLUTION COMPRISING A POLYCARBONATE SOLVENT BEING MISCIBLE WITH BONATE NON-SOLVENT, SAID SOLVENT BEING MISCIBLE WITH AND HAVING A BOILING POINT LOWER THAN THE BOILING POINT OF THE NON-SOLVENT, TO FORM A MIXTURE COMPRISING FROM ABOUT 1 TO 15 PARTS BY WEIGHT OF PRECIPITATED POLYCABONATE, FROM ABOUT 35 TO 65 PARTS BY WEIGHT OF POLYCARBONATE SOLVENT AND FROM ABOUT 35 TO 65 PARTS BY WEIGHT POLYCARBONATE NON-SOLVENT, SEPARATING THE PRECIPITATED POLYCARBONATE FROM THE RESULTING MIXTURE, REMOVING FROM THE REMAINDER OF THE MIXTURE THE UNPRECIPITATED POLYCARBONATE AND SUBSEQUENTLY REMOVING THE REMAINDER OF THE MIXTURE THAT AMOUNT OF POLYCARBONATE SOLVENT WHICH WAS INITIALLY ADDED TO SAID MIXING MEANS VIA SAID POLYCARBONATE SOLUTION AND CONTINUOUSLY RECYCLING THE RESULTING SOLUTION TO SAID MIXING MEANS WHERE IT IS MIXED WITH FRESH POLYCARBONATE SOLUTION.
References Cited (Backward Citations)
US3065204A
Cited
US3144432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |