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US3544602A
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Production of bicyclo-(2,2,2)-oct-7-en-2,3,5,6-tetracarboxylic dianhydride
Assignee: BASF SE
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Filing: 1968-08-26
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Granted: 1970-12-01
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Expires: 1988-08-26
Abstract
No abstract record available.
Inventors
- 👤 Heinz Nohe
- 👤 Hubert Suter
- 👤 Heinz Hannebaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:06
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/89; C07C; C07C61/00; C07C61/16; C07C61/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3125585A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |