US2788129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Horizontal multiple filter apparatus
Assignee: WARNER LEWIS Co
•
Filing: 1954-06-04
•
Granted: 1957-04-09
•
Expires: 1974-06-04
Abstract
No abstract record available.
Inventors
- 👤 Malcolm W Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:37
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/02; B01D17/04; B01D17/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2401039A
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US2348925A
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US2405838A
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US2412841A
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US2555607A
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US2649964A
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US2667272A
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US2707050A
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US2672984A
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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) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |