Patent US3522245A successfully refreshed from Google Patents.
US3522245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4 - oxo - 6 - styryl - 3,4;5,6 - tetrahydro - alpha-pyron compounds,compositions containing same,and process of making same
Assignee: Spezialchemie GmbH and Co
•
Filing: 1967-07-26
•
Granted: 1970-07-28
•
Expires: 1987-07-26
Abstract
No abstract record available.
Inventors
- 👤 Hans Brinkhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:34
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |