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Patent US2933045A successfully refreshed from Google Patents.
US2933045A
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Centrifugal pumps
Assignee: Individual
•
Filing: 1954-01-27
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Granted: 1960-04-19
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Expires: 1974-01-27
Abstract
No abstract record available.
Inventors
- 👤 Morris D Isserlis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:36
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US451827A
Cited
US1094836A
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GB253303A
Cited
US1795588A
Cited
GB317984A
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US1891201A
Cited
GB386432A
Cited
GB461227A
Cited
US2325477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |