US3479585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for measuring the impedance and phase of a solid propellant including a constant current source
Assignee: United States Department of the Air Force
•
Filing: 1967-08-02
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Granted: 1969-11-18
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Expires: 1987-08-02
Abstract
No abstract record available.
Inventors
- 👤 Bruce W Liebel
- 👤 Howard C Edgington
- 👤 Philip J Meredith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:35
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/22; G01N33/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3293546A
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US2548276A
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US2668943A
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US3026474A
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US3243699A
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US3230449A
Cited
US3388326A
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US3387776A
Cited
US3283242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |