US2924441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid distributor plate for counter flow contact apparatus
Assignee: Pfaudler Permutit Inc
•
Filing: 1956-01-24
•
Granted: 1960-02-09
•
Expires: 1976-01-24
Abstract
No abstract record available.
Inventors
- 👤 Alec V Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:36
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/16; B01D3/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1890536A
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US1920623A
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US2059044A
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US2201949A
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US2607662A
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US2523126A
Cited
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US2711308A
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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) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |