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Patent US3433250A successfully refreshed from Google Patents.
US3433250A
Expired / Lapsed
US
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Pop safety valve
Assignee: Toa Valve Co Ltd
•
Filing: 1967-12-12
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Granted: 1969-03-18
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Expires: 1987-12-12
Abstract
No abstract record available.
Inventors
- 👤 Noboru Hagihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:09
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/04; F16K17/0466; F16K17/0433; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7743
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2355916A
Cited
US2643671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |