Patent US3114784A successfully refreshed from Google Patents.
US3114784A
Expired / Lapsed
US
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Separation of xylene isomers with alkylidene-bis-benzamides
Assignee: Wyeth Holdings LLC
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Filing: 1960-11-03
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Granted: 1963-12-17
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Expires: 1980-11-03
Abstract
No abstract record available.
Inventors
- 👤 Anthony T Coscia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:13
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PROCESS FOR EFFECTING THE SEPARATION OF XYLENE ISOMERS FROM A MIXTURE THEREOF WHICH COMPRISES: INCORPORATING THE BIS-AMIDE REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
22 words
A PROCESS FOR EFFECTING THE SEPARATION OF XYLENE ISOMERS FROM A MIXTURE THEREOF WHICH COMPRISES: INCORPORATING THE BIS-AMIDE REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2421030A
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US2551891A
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US2842604A
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US2840621A
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US2756221A
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US2828339A
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US2901507A
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US2957811A
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US2936325A
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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) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |