Patent US3660440A successfully refreshed from Google Patents.
US3660440A
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Nonadecapenta - 1 6 9 13 18-ene-10-methyl carboxylate and the production thereof
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1969-09-22
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Granted: 1972-05-02
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Expires: 1989-09-22
Abstract
Abstract THEREIS PROVIDED AS A NEW COMPOUND NONADECAPENTA1,6,9,13,18-ENE-10-METHYL CARBOXYLATE. THIS IS PREPARED BY REACTION OF METHYL METHACRYLATE WITH BUTADIENE IN THE PRESENCE OF ZERO-VALENT NICKEL OR BY REACTION OF BUTADIENE WITH UNDERCATRI-1,5,10-EE-2-METHYL CARBOXYLATE FORMED AS AN INTERMEDIATE WHICH MAY BE ISOLATED OR NOT AS DISIRED.
Inventors
- 👤 Gunther Wilke
- 👤 Paul Heimbach
- 👤 Claus Delliehausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:23
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/52; C07C69/587
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |