Patent US3415040A successfully refreshed from Google Patents.
US3415040A
Expired / Lapsed
US
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Control for cleaning air screen
Assignee: Case LLC
•
Filing: 1966-10-31
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Granted: 1968-12-10
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Stuart D Pool
- 👤 Zimmerman Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:55
CPC Classifications
B; B60; B60K; B60K11/00; B60K11/02; B60K11/04; A; A01; A01D; A01D41/00; A01D41/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2376546A
Cited
US2455734A
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US2500268A
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US2633206A
Cited
GB762598A
Cited
US2886016A
Cited
US2848064A
Cited
US2896594A
Cited
US3087563A
Cited
US3097936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |