Patent US3222449A successfully refreshed from Google Patents.
US3222449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic shield arrangements
Assignee: GTC Corp
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Filing: 1962-07-23
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Granted: 1965-12-07
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Expires: 1982-07-23
Abstract
No abstract record available.
Inventors
- 👤 Edward L Garwin
- 👤 Lee O Heflinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:30
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/0056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A MAGNETIC SHIELD FOR SHIELDING AN ENCLOSED DEVICE COMPRISING AN OPEN-ENDED CYLINDER ENCLOSING SAID DEVICE AND CONSISTING OF MAGNETIC MATERIAL, TWO CYLINDRICAL CAPS OF MAGNETIC MATERIAL CLOSING THE OPEN ENDS OF SAID CYLINDER, AND FIRST, SECOND, THIRD AND FOURTH ELEMENTS OF MAGNETIC MATERIAL, EACH ELEMENT COMPRISING A SHEET OF RECTANGULAR OUTLINE AND CLOSED UPON ITSELF TO PROVIDE A CONTINUOUS LOOP OF SUBSTANTIALLY RECTANGULAR CROSS SECTION, SAID FOUR ELEMENTS NESTING IN SUCCESSION INSIDE EACH OTHER IN SUCH A MANNER THAT SAID SECOND ELEMENT IS DISPOSED TO COVER THE OPEN SIDES OF SAID FIRST ELEMENT, SAID THIRD ELEMENT COVERING THE OPEN SIDES OF SAID SECOND ELEMENT, AND SAID FOURTH ELEMENT COVERING THE OPEN SIDES OF SAID THIRD ELEMENT, WITH THE OPEN SIDES OF THE RESPECTIVE ELEMENTS BEING DISPOSED IN PLANES SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXES OF THE CYLINDER AND OF THE DEVICE.
Claim 2
Dependent Claim
141 words
A MAGNETIC SHIELD FOR SHIELDING AN ENCLOSED DEVICE COMPRISING AN OPEN-ENDED CYLINDER ENCLOSING SAID DEVICE AND CONSISTING OF MAGNETIC MATERIAL, TWO CYLINDRICAL CAPS OF MAGNETIC MATERIAL CLOSING THE OPEN ENDS OF SAID CYLINDER, AND FIRST, SECOND, THIRD AND FOURTH ELEMENTS OF MAGNETIC MATERIAL, EACH ELEMENT COMPRISING A SHEET OF RECTANGULAR OUTLINE AND CLOSED UPON ITSELF TO PROVIDE A CONTINUOUS LOOP OF SUBSTANTIALLY RECTANGULAR CROSS SECTION, SAID FOUR ELEMENTS NESTING IN SUCCESSION INSIDE EACH OTHER IN SUCH A MANNER THAT SAID SECOND ELEMENT IS DISPOSED TO COVER THE OPEN SIDES OF SAID FIRST ELEMENT, SAID THIRD ELEMENT COVERING THE OPEN SIDES OF SAID SECOND ELEMENT, AND SAID FOURTH ELEMENT COVERING THE OPEN SIDES OF SAID THIRD ELEMENT, WITH THE OPEN SIDES OF THE RESPECTIVE ELEMENTS BEING DISPOSED IN PLANES SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXES OF THE CYLINDER AND OF THE DEVICE.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |