US2963978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump impeller
Assignee: GIRTON Manufacturing Co
•
Filing: 1953-04-06
•
Granted: 1960-12-13
•
Expires: 1973-04-06
Abstract
No abstract record available.
Inventors
- 👤 Carl A Namur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:10
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/24; F04D29/247; F04D29/60; F04D29/62; F04D29/628
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1382665A
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US1835284A
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GB302953A
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DE662032C
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US2079942A
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US2178405A
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US2351516A
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US2406499A
Cited
US2671408A
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US2649706A
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US2537523A
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US2644402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |