Patent EP0074531A1 successfully refreshed from Google Patents.
US2419366A
Expired / Lapsed
US
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Alkanol esters
Assignee: Wyeth Holdings LLC
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Filing: 1942-04-08
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Granted: 1947-04-22
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Expires: 1962-04-08
Abstract
No abstract record available.
Inventors
- 👤 Northey Elmore Hathaway
- 👤 Hultquist Martin Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:04
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR698687A
Cited
US2079962A
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US2089212A
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US2260967A
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US2262357A
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US2262358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-21 | 1950-10-21 | 1951-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-21 | 1954-10-21 | 1955-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-21 | 1958-10-21 | 1959-04-22 | $7700.00 | Window Closed / Lapsed |