Patent US3739019A successfully refreshed from Google Patents.
US3739019A
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US
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Preparation of optically active trans chrysanthemic acid
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1970-06-29
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Granted: 1973-06-12
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Expires: 1990-06-29
Abstract
Abstract WHEREIN R IS AN ALKYL HAVING 1 TO 3 CARBON ATOMS OR A HALOGEN ATOM. R-C6H4-CH2-CH(-NH2)-C6H5 AN OPTICAL RESOLUTION METHOD FOR PREPARATION OF (+)TRANS-CHRYSANTHEMIC ACID WHICH COMPRISES USING AS A RESOLUTION AGENT A NOVEL AMINE REPRESENTED BY THE FORMULA,
Inventors
- 👤 K Ueda
- 👤 Y Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:37
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/782; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |