US3449891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine inlet air particle separator
Assignee: RTX Corp
•
Filing: 1966-11-15
•
Granted: 1969-06-17
•
Expires: 1986-11-15
Abstract
No abstract record available.
Inventors
- 👤 Herbert N Shohet
- 👤 Armand F Amelio
- 👤 Richard L House
- 👤 John M Kowalonek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:15
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/16; B; B01; B01D; B01D45/00; B01D45/12; B01D45/16; B64; B64D; B64D33/00; B64D33/02; F02B; F02B61/00; F02B61/04; F02C; F02C7/00; F02C7/04; F02C7/05; F02C7/052; F02M35/02; F02M35/022; F02M35/08; B64D2033/0246; Y; Y02; Y02T; Y02T50/00; Y02T50/60
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) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |