US3387644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel vapor and air eductor system
Assignee: McDonnell Douglas Corp
•
Filing: 1966-09-15
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Granted: 1968-06-11
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Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Albert Heinecke
- 👤 Walter B King
- 👤 Henry F Winchester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
B; B64; B64D; B64D37/00; B64D37/34; F; F05; F05B; F05B2260/00; F05B2260/60; F05B2260/601; F05B2260/602
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |