Patent US3395720A successfully refreshed from Google Patents.
US3395720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetohydrodynamic-vortex stream transducer
Assignee: United States Department of the Navy
•
Filing: 1965-02-24
•
Granted: 1968-08-06
•
Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 John D Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:43
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/08; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2082; Y10T137/2087; Y10T137/218; Y10T137/2191
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3273594A
Cited
US2652778A
Cited
US2763125A
Cited
US2997013A
Cited
US3072807A
Cited
US3138919A
Cited
US3176520A
Cited
US3071154A
Cited
US3182675A
Cited
US3257949A
Cited
US3270672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-06 | 1972-02-05 | 1972-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-06 | 1976-02-05 | 1976-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-06 | 1980-02-05 | 1980-08-06 | $7700.00 | Window Closed / Lapsed |