US2890659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slurry pump
Assignee: Individual
•
Filing: 1955-05-27
•
Granted: 1959-06-16
•
Expires: 1975-05-27
Abstract
No abstract record available.
Inventors
- 👤 Haentjens Otto
- 👤 Walter D Haentjens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:22
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/605; F04D29/606; F04D7/00; F04D7/02; F04D7/04; Y; Y10; Y10S; Y10S415/00; Y10S415/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US829017A
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US1413911A
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US1738898A
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US1754992A
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US1767535A
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US1734747A
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US1891201A
Cited
US2006727A
Cited
GB424556A
Cited
US2018700A
Cited
US2504140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |