Patent US3304875A successfully refreshed from Google Patents.
US3304875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Aetna Chemical Corp
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Filing: 1965-02-23
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Granted: 1967-02-21
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Wayne E Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:14
CPC Classifications
F; F04; F04D; F04D7/00; F04D7/02; F04D7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PUMP AND DRIVE MOTOR COMBINATION FOR CORROSIVE LIQUIDS INCLUDING: A DRIVE MOTOR COMPRISING A DRIVE SHAFT AND A CASING; PUMP SHAFT COUPLED TO SAID DRIVE SHAFT; A PUMP IMPELLER MOUNTED ON SAID PUMP SHAFT; A PUMP HOUSING ENCLOSING SAID IMPELLER AND HAVING A GENERALLY CYLINDRICAL CONFIGURATION AND FORMED OF A FRONT SECTION AND A REAR SECTION; A MULTIPLICITY OF BOLTS EXTENDING AXIALLY THROUGH SAID FRONT AND REAR SECTIONS OF SAID HOUSING AT SPACED ANGULAR POSITIONS AROUND THE PERIPHERY THEREOF FOR HOLDING SAID SECTIONS IN AN ASSEMBLED CONDITION, SAID REAR SECTION HAVING A PLURALITY OF AXIALLYEXTENDING PROTUBERANCES FORMED ON THE OUTER SURFACE THEREOF; A MOUNTING RING AFFIXED TO SAID PROTUBERANCES AND SURROUNDING THE AXIS OF ROTATION OF SAID PUMP SHAFT; AND MEANS SECURING SAID MOUNTING RING TO SAID MOTOR CASING.
Claim 2
Dependent Claim
130 words
A PUMP AND DRIVE MOTOR COMBINATION FOR CORROSIVE LIQUIDS INCLUDING: A DRIVE MOTOR COMPRISING A DRIVE SHAFT AND A CASING; PUMP SHAFT COUPLED TO SAID DRIVE SHAFT; A PUMP IMPELLER MOUNTED ON SAID PUMP SHAFT; A PUMP HOUSING ENCLOSING SAID IMPELLER AND HAVING A GENERALLY CYLINDRICAL CONFIGURATION AND FORMED OF A FRONT SECTION AND A REAR SECTION; A MULTIPLICITY OF BOLTS EXTENDING AXIALLY THROUGH SAID FRONT AND REAR SECTIONS OF SAID HOUSING AT SPACED ANGULAR POSITIONS AROUND THE PERIPHERY THEREOF FOR HOLDING SAID SECTIONS IN AN ASSEMBLED CONDITION, SAID REAR SECTION HAVING A PLURALITY OF AXIALLYEXTENDING PROTUBERANCES FORMED ON THE OUTER SURFACE THEREOF; A MOUNTING RING AFFIXED TO SAID PROTUBERANCES AND SURROUNDING THE AXIS OF ROTATION OF SAID PUMP SHAFT; AND MEANS SECURING SAID MOUNTING RING TO SAID MOTOR CASING.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |