US2622737A
Expired / Lapsed
US
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Assignee: WIPAC FILTRATION Ltd
•
Filing: 1949-01-27
•
Granted: 1952-12-23
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Balley Ronald Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D27/00; B01D27/02; Y; Y10; Y10S; Y10S116/00; Y10S116/42; Y10S210/00; Y10S210/17
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1982376A
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US2347184A
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US2203668A
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US2165826A
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US2196821A
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US2287982A
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US2462943A
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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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |