Patent US2226470A successfully refreshed from Google Patents.
US2226470A
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Oil treating apparatus
Assignee: LULU J MCGUFFEE
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Filing: 1939-10-18
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Granted: 1940-12-24
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Expires: 1959-10-18
Abstract
No abstract record available.
Inventors
- 👤 William M Mcguffee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:04
CPC Classifications
B; B01; B01F; B01F23/00; B01F23/40; B01F23/43; B01F23/431
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) | 1943-12-24 | 1944-06-24 | 1944-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-24 | 1948-06-24 | 1948-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-24 | 1952-06-24 | 1952-12-24 | $7700.00 | Window Closed / Lapsed |