Patent US3417778A successfully refreshed from Google Patents.
US3417778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve with resilient seat means
Assignee: Individual
•
Filing: 1967-10-05
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Granted: 1968-12-24
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Expires: 1987-10-05
Abstract
No abstract record available.
Inventors
- 👤 Johannes B Ratelband
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:04
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/145; F16K15/02; F16K15/025; F16K15/026; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7939
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US245904A
Cited
US257088A
Cited
US1100219A
Cited
US1252411A
Cited
US2233649A
Cited
US2640677A
Cited
US2717112A
Cited
US2916042A
Cited
GB855956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |