Patent US2831432A successfully refreshed from Google Patents.
US2831432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage centrifugal pump
Assignee: Goulds Pumps Inc
•
Filing: 1953-03-17
•
Granted: 1958-04-22
•
Expires: 1973-03-17
Abstract
No abstract record available.
Inventors
- 👤 Mann John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:19
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/06; F04D1/063
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE201855C
Cited
NL32960C
Cited
US1238731A
Cited
DE494877C
Cited
US1978277A
Cited
DE610778C
Cited
US2627812A
Cited
US2631539A
Cited
US2601828A
Cited
US2627817A
Cited
US2653546A
Cited
US2651998A
Cited
US2694365A
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 |