US2534253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining apparatus
Assignee: Anderson Clayton and Co
•
Filing: 1943-12-28
•
Granted: 1950-12-19
•
Expires: 1963-12-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Fash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:21
CPC Classifications
C; C11; C11B; C11B3/00; C11B3/02; C11B3/06; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0446; B01D11/0473
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US342692A
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US1218250A
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US1447898A
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US1405707A
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US1650514A
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US2141794A
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US2150733A
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US2219968A
Cited
US2319970A
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US2342042A
Cited
US2341536A
Cited
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 |