Patent US3141791A successfully refreshed from Google Patents.
US3141791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elements and method of making
Assignee: Sprague Electric Co
•
Filing: 1961-04-21
•
Granted: 1964-07-21
•
Expires: 1981-04-21
Abstract
No abstract record available.
Inventors
- 👤 Podolsky Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/84; Y; Y10; Y10S; Y10S118/00; Y10S118/21; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A METHOD OF FORMING A SPIRAL MAGNETIC THIN FILM ON THE SURFACE OF A NON-MAGNETIC ELECTRICALLY CONDUCTIVE CENTRAL CORE WHICH COMPRISES VAPORIZING A MAGNETIC MATERIAL IN A VACUUM, PASSING A PORTION OF THE VAPORIZED MATERIAL THROUGH A DEFINING APERTURE ADJACENT THE SOURCE OF VAPORIZATION, FORMING A BEAM OF VAPORIZED MATERIAL WITH SAID APERTURE, CONTINUOUSLY TRANSPORTING A NON-MAGNETIC ELECTRICALLY CONDUCTIVE WIRE IN A GIVEN DIRECTION THROUGH SAID BEAM OF THE VAPORIZED MATERIAL DEPOSING A PATTERN OF THE VAPORIZED MATERIAL ON THE WIRE, ROTATING SAID CONTINUOUSLY TRANSPORTED WIRE ON ITS AXIS FURING SAID MOVEMENT, AND CONTROLLABLY FORMING A SPIRAL BAND OF SAID MAGNETIC MATERIAL ON SAID CENTRAL CORE WITH SAID DEPOSITED PATTERN FROM SAID BEAM.
Claim 2
Independent Claim
113 words
A METHOD OF FORMING A SPIRAL MAGNETIC THIN FILM ON THE SURFACE OF A NON-MAGNETIC ELECTRICALLY CONDUCTIVE CENTRAL CORE WHICH COMPRISES VAPORIZING A MAGNETIC MATERIAL IN A VACUUM, PASSING A PORTION OF THE VAPORIZED MATERIAL THROUGH A DEFINING APERTURE ADJACENT THE SOURCE OF VAPORIZATION, FORMING A BEAM OF VAPORIZED MATERIAL WITH SAID APERTURE, CONTINUOUSLY TRANSPORTING A NON-MAGNETIC ELECTRICALLY CONDUCTIVE WIRE IN A GIVEN DIRECTION THROUGH SAID BEAM OF THE VAPORIZED MATERIAL DEPOSING A PATTERN OF THE VAPORIZED MATERIAL ON THE WIRE, ROTATING SAID CONTINUOUSLY TRANSPORTED WIRE ON ITS AXIS FURING SAID MOVEMENT, AND CONTROLLABLY FORMING A SPIRAL BAND OF SAID MAGNETIC MATERIAL ON SAID CENTRAL CORE WITH SAID DEPOSITED PATTERN FROM SAID BEAM.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |