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Patent US2229204A successfully refreshed from Google Patents.
US2229204A
Expired / Lapsed
US
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Preparation of dehydracetic acid
Assignee: Carbide and Carbon Chemicals Corp
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Filing: 1936-06-06
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Granted: 1941-01-21
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Expires: 1956-06-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Albert B Boese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:22
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/34; C07D309/36
Claims Analysis
Total Claims: 0
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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) | 1944-01-21 | 1944-07-22 | 1945-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-21 | 1948-07-22 | 1949-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-21 | 1952-07-22 | 1953-01-21 | $7700.00 | Window Closed / Lapsed |