Patent US3081210A successfully refreshed from Google Patents.
US3081210A
Expired / Lapsed
US
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Method for fabricating small elements of thin magnetic film
Assignee: General Electric Co
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Filing: 1960-04-04
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Granted: 1963-03-12
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Expires: 1980-04-04
Abstract
No abstract record available.
Inventors
- 👤 Irving W Wolf
- 👤 Oliver G White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:47
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/28; H; H01; H01F; H01F41/00; H01F41/32; H01F41/34; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE METHOD OF PRODUCING A LOGIC MATRIX HAVING A SURFACE OF DISCRETE, THIN PERMALLOY FILM ELEMENTS FROM A MEMBER HAVING ON THE SURFACE THEREOF A CONTINUOUS, THIN PERMALLOY FILM WHOSE THICKNES IS ON THE ORDER OF 1000 ANGSTROMS, SAID METHOD COMPRISING: THE STEP OF MASKING PORTIONS OF SAID FILM CORRESPONDING TO DESIRED ELEMENTS IN THE FINAL MATRIX FOR PREVENTING ATTACK BY FERRIC CHLORIDE; AND IMMERSING SAID MEMBER IN AN ETCHING SOLUTION OF 1 TO 5% OF 42* BAUME'' FERRIC CHLORIDE TO REMOVE THE UNMASKED PORTIONS OF SAID PERMALLOY FILM.
Claim 2
Independent Claim
89 words
THE METHOD OF PRODUCING A LOGIC MATRIX HAVING A SURFACE OF DISCRETE, THIN PERMALLOY FILM ELEMENTS FROM A MEMBER HAVING ON THE SURFACE THEREOF A CONTINUOUS, THIN PERMALLOY FILM WHOSE THICKNES IS ON THE ORDER OF 1000 ANGSTROMS, SAID METHOD COMPRISING: THE STEP OF MASKING PORTIONS OF SAID FILM CORRESPONDING TO DESIRED ELEMENTS IN THE FINAL MATRIX FOR PREVENTING ATTACK BY FERRIC CHLORIDE; AND IMMERSING SAID MEMBER IN AN ETCHING SOLUTION OF 1 TO 5% OF 42* BAUME'' FERRIC CHLORIDE TO REMOVE THE UNMASKED PORTIONS OF SAID PERMALLOY FILM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |