US3424430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swingably supported valve
Assignee: MADELEINE M HOELSCH
•
Filing: 1966-10-31
•
Granted: 1969-01-28
•
Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Edward S Hoelsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:22
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US847594A
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US2653839A
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US3072139A
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US3056577A
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US3233861A
Cited
US3206164A
Cited
US3202175A
Cited
US3146792A
Cited
US3356337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |