US3452225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrogasdynamic systems
Assignee: Energy Innovations Inc
•
Filing: 1964-08-13
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Granted: 1969-06-24
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Meredith C Gourdine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:34
CPC Classifications
H; H02; H02N; H02N3/00; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE371599C
Cited
US2004352A
Cited
US2210918A
Cited
US3095163A
Cited
US3167666A
Cited
FR1330199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |