Patent US3371471A successfully refreshed from Google Patents.
US3371471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand and dust collector for engine air inlets
Assignee: Avco Corp
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Filing: 1965-10-15
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Granted: 1968-03-05
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Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Harold D Connors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:13
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/05; F02C7/052
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-05 | 1971-09-04 | 1972-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-05 | 1975-09-04 | 1976-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-05 | 1979-09-04 | 1980-03-05 | $7700.00 | Window Closed / Lapsed |