US3241493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump impeller
Assignee: Cascade Corp
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Filing: 1964-05-04
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Granted: 1966-03-22
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Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Frey Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:06
CPC Classifications
F; F04; F04D; F04D3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PUMP IMPELLER COMPRISING A CYLINDRICAL BODY, A CYLINDRICAL SHEATH FITTING SNUGLY ABOUT THE CIRCUMFERENCE OF SAID BODY, MEANS ADJACENT ONE END OF THE SHEATH, PRESENTED BY THE SHEATH AND BY SAID BODY, PRODUCING AN INTERFITTING MECHANICAL LOCK HOLDING THE SHEATH IN PLACE, MEANS ADJACENT THE OPPOSITE END OF THE SHEATH, PRESENTED BY THE SHEATH AND BODY, PRODUCING ANOTHER INTERFITTING MECHANICAL LOCK HOLDING THE SHEATH IN PLACE, AND IMPELLER BLADES DISTRIBUTED CIRCUMFERENTIALY ON SAID SHEATH PROJECTING OUT FROM SAID JOINED TO THE SHEATH.
Claim 2
Dependent Claim
83 words
A PUMP IMPELLER COMPRISING A CYLINDRICAL BODY, A CYLINDRICAL SHEATH FITTING SNUGLY ABOUT THE CIRCUMFERENCE OF SAID BODY, MEANS ADJACENT ONE END OF THE SHEATH, PRESENTED BY THE SHEATH AND BY SAID BODY, PRODUCING AN INTERFITTING MECHANICAL LOCK HOLDING THE SHEATH IN PLACE, MEANS ADJACENT THE OPPOSITE END OF THE SHEATH, PRESENTED BY THE SHEATH AND BODY, PRODUCING ANOTHER INTERFITTING MECHANICAL LOCK HOLDING THE SHEATH IN PLACE, AND IMPELLER BLADES DISTRIBUTED CIRCUMFERENTIALY ON SAID SHEATH PROJECTING OUT FROM SAID JOINED TO THE SHEATH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |