Patent US2726963A successfully refreshed from Google Patents.
US3287630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for improving the uniformity of magnetic fields
Assignee: Varian Medical Systems Inc
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Filing: 1964-03-02
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Granted: 1966-11-22
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Robert E Gang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:28
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/202; G; G01; G01N; G01N24/00; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/381; G01R33/3815; G01R33/387; G01R33/3875; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/851
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN A SPECTROMETER, THE COMBINATION OF: A SAMPLE SECURED IN CONTAINER HAVING A MAJOR AXIS; A SUPERCONDUCTING SOLENOID FOR PROVIDING A MAGNETIC FIELD HAVING A MAJOR COMPONENT SUBSTANTIALLY IN ALIGNMENT WITH THE MAJOR AXIS OF SAID CONTAINER; A FIRST PAIR OF SPACED COILS FOR PROVIDING FIRST ORDER GRADIENT CORRECTIONS, COAXIALLY ALIGNED WITH SUCH CONTAINER, AND CONNECTED IN CURRENT OPPOSITION; A SECOND PAIR OF SPACED COILS FOR PROVIDING SECOND ORDER GRADIENT CORRECTIONS, COAXIALLY ALIGNED WITH SAID CONTAINER AND ADDITIVELY CURRENT CONNECTED; A THIRD PAIR OF COILS COAXIALLY ALIGNED WITH SAID CONTAINER AND ADDITIVELY CURRENT CONNECTED FOR MINIMIZING THE ZERO ORDER COMPONENT DEVELOPED BY SAID SECOND PAIR OF COILS; FIRST AND SECOND SETS OF COILS FOR PROVIDING FIRST ORDER GRADIENT CORRECTINS, EACH SET COMPRISING FOUR CORRECTING COILS SUBSTANTIALLY SYMMETRICALLY DISPOSED ABOUT THE CENTER OF SAID SAMPLE, TWO OF SUCH COILS BEING 180* APART LAOCATED OVER SUCH CENTER, THE TWO COILS BEING 180* APART LOCATED
Claim 2
Dependent Claim
152 words
IN A SPECTROMETER, THE COMBINATION OF: A SAMPLE SECURED IN CONTAINER HAVING A MAJOR AXIS; A SUPERCONDUCTING SOLENOID FOR PROVIDING A MAGNETIC FIELD HAVING A MAJOR COMPONENT SUBSTANTIALLY IN ALIGNMENT WITH THE MAJOR AXIS OF SAID CONTAINER; A FIRST PAIR OF SPACED COILS FOR PROVIDING FIRST ORDER GRADIENT CORRECTIONS, COAXIALLY ALIGNED WITH SUCH CONTAINER, AND CONNECTED IN CURRENT OPPOSITION; A SECOND PAIR OF SPACED COILS FOR PROVIDING SECOND ORDER GRADIENT CORRECTIONS, COAXIALLY ALIGNED WITH SAID CONTAINER AND ADDITIVELY CURRENT CONNECTED; A THIRD PAIR OF COILS COAXIALLY ALIGNED WITH SAID CONTAINER AND ADDITIVELY CURRENT CONNECTED FOR MINIMIZING THE ZERO ORDER COMPONENT DEVELOPED BY SAID SECOND PAIR OF COILS; FIRST AND SECOND SETS OF COILS FOR PROVIDING FIRST ORDER GRADIENT CORRECTINS, EACH SET COMPRISING FOUR CORRECTING COILS SUBSTANTIALLY SYMMETRICALLY DISPOSED ABOUT THE CENTER OF SAID SAMPLE, TWO OF SUCH COILS BEING 180* APART LAOCATED OVER SUCH CENTER, THE TWO COILS BEING 180* APART LOCATED
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |