US3495253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planar fluid amplifier
Assignee: Individual
•
Filing: 1967-06-26
•
Granted: 1970-02-10
•
Expires: 1987-06-26
Abstract
No abstract record available.
Inventors
- 👤 George B Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:40
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/08; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2164; Y10T137/218; Y10T137/2202; Y10T137/2218; Y10T137/2273
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3039490A
Cited
US3080886A
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US3181545A
Cited
US3334657A
Cited
US3266513A
Cited
US3375840A
Cited
US3366131A
Cited
US3398758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |