Patent US3513641A successfully refreshed from Google Patents.
US3513641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foreign particle separator for an air moving member
Assignee: Boeing Co
•
Filing: 1968-08-22
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Granted: 1970-05-26
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Expires: 1988-08-22
Abstract
No abstract record available.
Inventors
- 👤 Robert P Hooper
- 👤 Vernon L Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:09
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; F02C7/05; F02C7/052; B; B01; B01D; B01D45/00; B01D45/12; B01D45/16
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) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |