US3495609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid induction amplifier
Assignee: United States Department of the Army
•
Filing: 1967-07-03
•
Granted: 1970-02-17
•
Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Elmer L Swartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:57
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/02; F15C1/04; F15C1/08; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/2164; Y10T137/2229; Y10T137/224
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3034628A
Cited
US3232095A
Cited
US3191008A
Cited
US3263501A
Cited
US3324730A
Cited
US3371540A
Cited
US3417770A
Cited
US3386709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |