Patent US2356348A successfully refreshed from Google Patents.
US2356348A
Expired / Lapsed
US
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Purification of organic liquids
Assignee: Standard Oil Development Co
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Filing: 1941-07-30
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Granted: 1944-08-22
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Expires: 1961-07-30
Abstract
No abstract record available.
Inventors
- 👤 John A Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:17
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; C07C29/82; C07C45/00; C07C45/78; C07C45/81; C07C45/82; C07C45/84
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) | 1947-08-22 | 1948-02-21 | 1948-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-22 | 1952-02-21 | 1952-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-22 | 1956-02-21 | 1956-08-22 | $7700.00 | Window Closed / Lapsed |