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Patent US3394939A successfully refreshed from Google Patents.
US3394939A
Expired / Lapsed
US
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Fluid pressure actuable seal
Assignee: Acadia Elastomers Corp
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Filing: 1966-12-08
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Granted: 1968-07-30
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Expires: 1986-12-08
Abstract
No abstract record available.
Inventors
- 👤 Mastro Alex
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:00
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3208; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088; Y10T74/18128; Y10T74/18136
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2804324A
Cited
US2932535A
Cited
GB873384A
Cited
US3071386A
Cited
FR1297515A
Cited
US3131611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |