US2907406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry type air cleaner
Assignee: Donaldson Co Inc
•
Filing: 1957-01-02
•
Granted: 1959-10-06
•
Expires: 1977-01-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Baden
- 👤 Lawrence J Olson
- 👤 Harold L Miller
- 👤 Kenneth W Copp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:23
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/023; B01D50/00; B01D50/20; F; F02; F02M; F02M35/00; F02M35/02; F02M35/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1049789A
Cited
US1746283A
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US1779458A
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CH166481A
Cited
US2322948A
Cited
US2580648A
Cited
US2569222A
Cited
GB725712A
Cited
US2742105A
Cited
US2770321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |