US2788086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner with dual air intake
Assignee: Houdaille Industries Inc
•
Filing: 1952-11-15
•
Granted: 1957-04-09
•
Expires: 1972-11-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Sebok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:52
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/02; F02M35/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1221956A
Cited
FR643699A
Cited
US1960260A
Cited
US2143350A
Cited
GB550292A
Cited
US2443326A
Cited
FR917801A
Cited
FR922975A
Cited
US2690233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |