US3532719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of isochromans
Assignee: International Flavors and Fragrances Inc
•
Filing: 1968-10-28
•
Granted: 1970-10-06
•
Expires: 1988-10-28
Abstract
No abstract record available.
Inventors
- 👤 Ernst T Theimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:20
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/76; C07D311/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2701254A
Cited
US3360530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |