Patent US3392512A successfully refreshed from Google Patents.
US3392512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary filter and fan for cab
Assignee: Case LLC
•
Filing: 1966-10-27
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Granted: 1968-07-16
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Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Walter T Ziolko
- 👤 Rudolph A Holmberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:45
CPC Classifications
A; A01; A01D; A01D41/00; A01D41/12; B; B60; B60H; B60H3/00; B60H3/06; B60H3/0608; F; F24; F24F; F24F8/00; F24F8/10; F24F8/108
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2213016A
Cited
FR883515A
Cited
US2502214A
Cited
US2537278A
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GB717848A
Cited
US2729436A
Cited
US2954091A
Cited
US2970669A
Cited
US3018896A
Cited
US2966960A
Cited
US3212239A
Cited
US3107987A
Cited
US3289393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |