US3545208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular slit colloid thrustor
Assignee: National Aeronautics and Space Administration
•
Filing: 1969-01-15
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Granted: 1970-12-08
•
Expires: 1989-01-15
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Stark
- 👤 William A Burton
- 👤 Allan Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:29
CPC Classifications
F; F02; F02K; F02K5/00; B; B64; B64G; B64G1/00; B64G1/22; B64G1/40; B64G1/411; B64G1/413
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2893893A
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US2893894A
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US3049301A
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US3122882A
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US3120736A
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US3317138A
Cited
US3286467A
Cited
US3400241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |