Patent US3370404A successfully refreshed from Google Patents.
US3370404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air cleaner for attachment to paint booth doors
Assignee: CHARLES LEROY LEEPER
•
Filing: 1967-03-20
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Granted: 1968-02-27
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Expires: 1987-03-20
Abstract
No abstract record available.
Inventors
- 👤 Leeper Charles Leroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:47
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/021; B01D47/028; B05; B05B; B05B14/00; B05B14/40; B05B14/46; B05B16/00; B05B16/60; Y; Y10; Y10S; Y10S55/00; Y10S55/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2257516A
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US2392601A
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US2498718A
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US2694466A
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GB724635A
Cited
US2795288A
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FR1192088A
Cited
US3070936A
Cited
US3150618A
Cited
US3291581A
Cited
US3298149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |