US2167322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering apparatus
Assignee: Cuno Engineered Products Inc
•
Filing: 1936-07-17
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Granted: 1939-07-25
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Expires: 1956-07-17
Abstract
No abstract record available.
Inventors
- 👤 Charles H Cuno
- 👤 Sidney L Wolfson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:02
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/44; B01D29/48; B01D29/50; B01D29/52; B01D29/62; B01D29/66; B01D29/68; B01D29/682; B01D2201/00; B01D2201/31; B01D2201/313
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) | 1942-07-24 | 1943-01-23 | 1943-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-24 | 1947-01-23 | 1947-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-24 | 1951-01-23 | 1951-07-25 | $7700.00 | Window Closed / Lapsed |