US3413504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic pump having an improved helical rotor
Assignee: Boeing North American Inc
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Filing: 1966-02-01
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Granted: 1968-11-26
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Expires: 1986-02-01
Abstract
No abstract record available.
Inventors
- 👤 Richard S Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:14
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/02; H02K44/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A HELICAL ROTOR ELECTROMAGNETIC PUMP FOR PUMPING FLUIDS, AN IMPROVED ROTOR COMPRISING: (A) AT LEAST A FIRST CORE MEMBER, (B) A PLURALITY OF ADJUSTABLE ROTOR POLE SHOES COOPERATING WITH SAID CORE MEMBER, (C) SELECTED ONES OF SAID ROTOR POLE SHOES SUITABLY ARRANGED IN JUXTAPOSITION, (D) AT LEAST FIRST AND SECOND ROTOR POLE SURFACES DEVELOPED BY SAID JUXTAPOSED POLE SHOES, (E) SAID FIRST AND SECOND POLE SURFACES DEFINING A VARIABLE HELIX ANGLE, AND
Claim 2
Dependent Claim
73 words
IN A HELICAL ROTOR ELECTROMAGNETIC PUMP FOR PUMPING FLUIDS, AN IMPROVED ROTOR COMPRISING: (A) AT LEAST A FIRST CORE MEMBER, (B) A PLURALITY OF ADJUSTABLE ROTOR POLE SHOES COOPERATING WITH SAID CORE MEMBER, (C) SELECTED ONES OF SAID ROTOR POLE SHOES SUITABLY ARRANGED IN JUXTAPOSITION, (D) AT LEAST FIRST AND SECOND ROTOR POLE SURFACES DEVELOPED BY SAID JUXTAPOSED POLE SHOES, (E) SAID FIRST AND SECOND POLE SURFACES DEFINING A VARIABLE HELIX ANGLE, AND
References Cited (Backward Citations)
US2490789A
Cited
US2940393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |