Patent US3429940A successfully refreshed from Google Patents.
US3429940A
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Trimethyl cyclododecatriene process
Assignee: Columbian Carbon Co
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Filing: 1967-08-28
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Granted: 1969-02-25
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Expires: 1987-08-28
Abstract
No abstract record available.
Inventors
- 👤 Francis T Wadsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:42
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/42; C07C2/44; C07C2/46; C07C2/465; C07C2531/00; C07C2531/02; C07C2531/04; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3008943A
Cited
US2979543A
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US3167593A
Cited
GB921954A
Cited
US3083246A
Cited
US3231627A
Cited
US3326990A
Cited
US3366701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |