Patent US2555857A successfully refreshed from Google Patents.
Patent US3336662A successfully refreshed from Google Patents.
US3336662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shielding a magnetic core
Assignee: Massachusetts Institute of Technology
•
Filing: 1962-06-07
•
Granted: 1967-08-22
•
Expires: 1982-06-07
Abstract
No abstract record available.
Inventors
- 👤 Howland Bradford
- 👤 Robert S Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:11
CPC Classifications
H; H01; H01F; H01F17/00; H01F17/04; H01F17/043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
A METHOD OF PRODUCING A LOW LEAKAGE FLUX PATH MAGNETIC CORE COMPRISING CHEMICALLY DEPOSITING AN ELECTRICALLY CONDUCTIVE NON-MAGNETIC FILM TO COMPLETELY ENCOMPASS SAID CORE, REMOVING A PORTION OF SAID FILM TO FORM A FIRST CONTINUOUS GAP PARALLEL TO THE FLUX PATH IN SAID CORE, COATING SAID NON-MAGNETIC CONDUCTIVE FILM AND SAID GAP WITH A LAYER OF ELECTRICALLY INSULATING, PLASTIC, CHEMICALLY DE-
References Cited (Backward Citations)
DE229109C
Cited
US3063135A
Cited
US3123787A
Cited
US2939096A
Cited
US3032729A
Cited
US3010185A
Cited
US3154840A
Cited
US3149296A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |