Patent DE3936703C2 successfully refreshed from Google Patents.
US2824570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flush type topping-off valve
Assignee: Individual
•
Filing: 1953-04-07
•
Granted: 1958-02-25
•
Expires: 1973-04-07
Abstract
No abstract record available.
Inventors
- 👤 Bernard R Silverman
- 👤 Geambeardino John Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:13
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/24; Y; Y10; Y10T; Y10T137/00; Y10T137/3584
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US234823A
Cited
US1124013A
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US1423418A
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US1573576A
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GB232429A
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GB490318A
Cited
US2390026A
Cited
US2390199A
Cited
FR1016087A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |