US2480732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus for purifying fluids
Assignee: Hudbay Minerals Inc
•
Filing: 1944-03-03
•
Granted: 1949-08-30
•
Expires: 1964-03-03
Abstract
No abstract record available.
Inventors
- 👤 Hendrickson Luther Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:29
CPC Classifications
B; B01; B01D; B01D25/00; B01D25/12; B01D25/21; B01D25/215; B01D25/30; B01D25/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US301795A
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US541659A
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US664906A
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US650741A
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US846582A
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US1141491A
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US1200763A
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US1302814A
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US1226611A
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US1488862A
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US2245217A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-29 | 1953-02-28 | 1953-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-29 | 1957-02-28 | 1957-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-29 | 1961-02-28 | 1961-08-30 | $7700.00 | Window Closed / Lapsed |