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Patent US2534809A successfully refreshed from Google Patents.
US2534809A
Expired / Lapsed
US
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Fractionation of tall oil
Assignee: —
•
Filing: —
•
Granted: 1950-12-19
•
Expires: 1967-12-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:48
CPC Classifications
C; C11; C11D; C11D15/00; C09; C09F; C09F1/00; C11B; C11B13/00; C11B13/005; C11C; C11C1/00; C11C1/02; C11C1/025; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/74; Y10; Y10T; Y10T279/00; Y10T279/17; Y10T279/17042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |