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US2385238A
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US
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Filtration
Assignee: Lummus Technology LLC
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Filing: 1942-04-29
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Granted: 1945-09-18
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Expires: 1962-04-29
Abstract
No abstract record available.
Inventors
- 👤 Leon A Tarbox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:42
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/16; B01D33/00; B01D33/06; B01D33/15; B01D33/21; B01D33/70; B01D33/76; B01D33/80; B01D33/804; B01D33/807; B01D37/00; B01D37/04
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) | 1948-09-17 | 1949-03-19 | 1949-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-09-17 | 1953-03-19 | 1953-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-09-17 | 1957-03-19 | 1957-09-18 | $7700.00 | Window Closed / Lapsed |