US2171202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering fatty acids
Assignee: CHARLES H LEWIS
•
Filing: 1937-02-13
•
Granted: 1939-08-29
•
Expires: 1957-02-13
Abstract
No abstract record available.
Inventors
- 👤 Oliver M Urbain
- 👤 William R Stemen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:37
CPC Classifications
C; C11; C11B; C11B13/00; C11B13/02; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/74
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1942-08-28 | 1943-02-27 | 1943-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-28 | 1947-02-27 | 1947-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-28 | 1951-02-27 | 1951-08-29 | $7700.00 | Window Closed / Lapsed |