US3488033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-pressure relieving ball valve
Assignee: Boeing North American Inc
•
Filing: 1967-12-28
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Granted: 1970-01-06
•
Expires: 1987-12-28
Abstract
No abstract record available.
Inventors
- 👤 Werner K Priese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:39
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)
US2989990A
Cited
US3030068A
Cited
US3100499A
Cited
US3146988A
Cited
US3168279A
Cited
US3425663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |