US2164189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fatty matter refining process
Assignee: Shell Development Co
•
Filing: 1937-07-17
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Granted: 1939-06-27
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Expires: 1957-07-17
Abstract
No abstract record available.
Inventors
- 👤 Walter J Hund
- 👤 Donald H Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:45
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/02; C11B3/06; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0446; B01D11/0488
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) | 1942-06-26 | 1942-12-26 | 1943-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-26 | 1946-12-26 | 1947-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-26 | 1950-12-26 | 1951-06-27 | $7700.00 | Window Closed / Lapsed |