US2831434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-priming centrifugal pump
Assignee: Worthington Corp
•
Filing: 1956-04-05
•
Granted: 1958-04-22
•
Expires: 1976-04-05
Abstract
No abstract record available.
Inventors
- 👤 Robert F Paashaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:26
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/004; F04D9/005; F04D9/02; Y; Y10; Y10S; Y10S415/00; Y10S415/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1915678A
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US1989061A
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US2291760A
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US2405836A
Cited
US2425070A
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US2428487A
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GB679246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |