US3263149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superconductive d.-c. to a.-c. converter
Assignee: General Electric Co
•
Filing: 1961-07-05
•
Granted: 1966-07-26
•
Expires: 1981-07-05
Abstract
No abstract record available.
Inventors
- 👤 William H Meiklejohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:59
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/44; H; H02; H02M; H02M11/00; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/856; Y10S505/857
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
AN APPARATUS FOR CONVERTING DIRECT CURRENT TO ALTERNATING CURRENT COMPRISING, AN A.-C. OUTPUT COIL INCLUDING AN INDUCTIVE WINDING AND A CORE, A SLEEVE CONSTRUCTED OF A MATERIAL CAPABLE OF BEING RENDERED SUPERCONDUCTIVE OPERATIVELY ENCLOSING SAID A.-C. OUTPUT COIL TO PREVENT MAGNETIC FLUX FROM REACHING SAID A.-C. OUTPUT COIL WHICH IS NOT IN EXCESS OF THE AMOUNT REQUIRED TO RENDER SAID SUPERCONDUCTIVE SLEEVE NORMALLY CONDUCTIVE, D.-C. INPUT COIL OPERABLY SURROUNDING SAID SUPERCONDUCTIVE SLEEVE TO SUBJECT IT TO A MAGNETIC FIELD, AND AN C.-C. EXCITATION COIL OPERATIVELY ENCLOSING SAID D.-C. INPUT COIL, THE MAGNETIC FIELD CREATED BY SAID A.-C. EXCITATION COIL COMBINING WITH THE MAGNETIC FIELD OF SAID D.-C. COIL TO CONTROL THE CONDUCTIVE STATE OF SAID SLEEVE.
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) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |