Patent US2469446A successfully refreshed from Google Patents.
US2469446A
Expired / Lapsed
US
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Mixed esters of fatty acids
Assignee: EF Drew and Co Inc
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Filing: 1944-08-08
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Granted: 1949-05-10
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Expires: 1964-08-08
Abstract
No abstract record available.
Inventors
- 👤 Frank A Strauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:28
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/02; C07C69/22; C07C69/30; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/1055; B32B17/10761; C07C69/28; C11; C11C; C11C1/00; C11C1/02; C11C1/025; C11C1/08; C11C1/10; C11C1/103; C11C3/00; C11C3/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1534752A
Cited
US1739315A
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US1807304A
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US2118506A
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US2040937A
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US2221674A
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US2306315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |