US3474464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing acetylacetonates
Assignee: WR Grace and Co
•
Filing: 1967-08-03
•
Granted: 1969-10-21
•
Expires: 1987-08-03
Abstract
No abstract record available.
Inventors
- 👤 John C Matthews
- 👤 Louis L Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:06
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/77; C07C49/00; C07C49/92
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2845465A
Cited
US3088955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-20 | 1973-04-21 | 1973-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-20 | 1977-04-21 | 1977-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-20 | 1981-04-21 | 1981-10-21 | $7700.00 | Window Closed / Lapsed |