US2673681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined fluid impeller and self-sealing closure
Assignee: Individual
•
Filing: 1950-06-07
•
Granted: 1954-03-30
•
Expires: 1970-06-07
Abstract
No abstract record available.
Inventors
- 👤 Emil A Mader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:51
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/32; F04D29/34; F04D29/36; F04D29/362; F04D29/364
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2047077A
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US2111817A
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US2111818A
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US2375909A
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US2383002A
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US2383001A
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US2383004A
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US2400240A
Cited
US2441427A
Cited
US2459815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |