US2446464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beta, gamma-alkenyl ethers of glycerol, and esters thereof
Assignee: Shell Development Co
•
Filing: 1944-10-30
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Granted: 1948-08-03
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Expires: 1964-10-30
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Evans
- 👤 Donald S Melstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:30
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/14; C07C69/00; C07C69/62; C07C69/63
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USRE22347E
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US2351025A
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US2351024A
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US2161937A
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US2335813A
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US2221771A
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US2343053A
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US2401261A
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US2975018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |