Patent US602074A successfully refreshed from Google Patents.
Patent US2890659A successfully refreshed from Google Patents.
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 08:29
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE515082C
Cited
US829017A
Cited
US1413911A
Cited
US1738898A
Cited
US1754992A
Cited
US1767535A
Cited
US1734747A
Cited
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 |