US3439897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve assembly with both high and low pressure side seals
Assignee: Boeing North American Inc
•
Filing: 1966-06-28
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Granted: 1969-04-22
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Expires: 1986-06-28
Abstract
No abstract record available.
Inventors
- 👤 Werner K Priese
- 👤 Vernon E Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:42
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/201; F16K5/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3006599A
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US3067977A
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US3058484A
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US3154094A
Cited
US3168279A
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US3357679A
Cited
US3301523A
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US3273852A
Cited
US3345032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |