Patent US5349796A successfully refreshed from Google Patents.
Patent US3217052A successfully refreshed from Google Patents.
US3217052A
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US
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Separation of divinylbenzene from a mixture comprising divinylbenzene and ethylvinylbenzene
Assignee: Total Petrochemicals and Refining USA Inc
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Filing: 1962-11-23
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Granted: 1965-11-09
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Expires: 1982-11-23
Abstract
No abstract record available.
Inventors
- 👤 Paul D Meek
- 👤 Rubinstein David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:42
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/152; C07C7/156
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD OF SEPARATING DIVINYLBENZENE FROM A MIXTURE COMPRISING DIVINYLBENZENE AND ETHYLVINYLBENZENE COMPRISING THE STEPS OF: (A) CONTACTING THE MIXTURE AT A TEMPERATURE BELOW ABOUT 25*C., IN LIQUID STATE, WITH A SOLID SALT SELECTED FROM THE GROUP CONSISTING OF MONOVALENT COPPER AND SILVER SALTS TO FORM A COORDINATION COMPOUND; (B) SEPARATING SAID COORDINATION COMPOUND SO OBTAINED FROM THE LIQUID PHASE; (C) HEATING SAID COORDINATION COMPOUND TO RECOVER A LIQUID HAVING A SUBSTANTIALLY HIGHER DIVINYLBENZENE CONTENT AND HAVING A SUBSTANTIALLY LOWER ETHYLVINYLBENZENE CONTENT THAN SAID ORIGINAL MIXTURE.
Claim 2
Independent Claim
86 words
A METHOD OF SEPARATING DIVINYLBENZENE FROM A MIXTURE COMPRISING DIVINYLBENZENE AND ETHYLVINYLBENZENE COMPRISING THE STEPS OF: (A) CONTACTING THE MIXTURE AT A TEMPERATURE BELOW ABOUT 25*C., IN LIQUID STATE, WITH A SOLID SALT SELECTED FROM THE GROUP CONSISTING OF MONOVALENT COPPER AND SILVER SALTS TO FORM A COORDINATION COMPOUND; (B) SEPARATING SAID COORDINATION COMPOUND SO OBTAINED FROM THE LIQUID PHASE; (C) HEATING SAID COORDINATION COMPOUND TO RECOVER A LIQUID HAVING A SUBSTANTIALLY HIGHER DIVINYLBENZENE CONTENT AND HAVING A SUBSTANTIALLY LOWER ETHYLVINYLBENZENE CONTENT THAN SAID ORIGINAL MIXTURE.
References Cited (Backward Citations)
US2973394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |