Patent US2232065A successfully refreshed from Google Patents.
US2232065A
Expired / Lapsed
US
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Air filter
Assignee: STAYNEW FILTER Corp
•
Filing: 1938-06-20
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Granted: 1941-02-18
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Expires: 1958-06-20
Abstract
No abstract record available.
Inventors
- 👤 Claude F Hasselwander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:34
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/52; B01D46/521; B01D46/523; A; A62; A62B; A62B23/00; B01D46/0002; B01D46/0005; B01D46/0084; B01D46/0091; B01D46/0093; B01D46/10
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) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |