US3206342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making a sheet array of magnetic metal elements
Assignee: RCA Corp
•
Filing: 1961-08-31
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Granted: 1965-09-14
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Expires: 1981-08-31
Abstract
No abstract record available.
Inventors
- 👤 George R Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN THE METHOD OF PRODUCING A SHEET ARRAY OF MEMORY ELEMENTS, THE STEPS OF APPLYING A LAYER OF A RESINOUS ETCH RESISTANT MATERIAL ON BOTH SIDES OF A SHEET OF MAGNETIC METAL IN A PATTERN PERMITTING THE ETCHING OF APERTURES FROM BOTH SIDES OF THE SHEET AND PERMITTING THE ETCHING FROM ONE SIDE OF THE SHEET OF GAPS SURROUNDING AT LEAST ONE APERTURE AND DEFINING MEMORY ELEMENTS, ETCHING APERTURES AND GAPS IN SAID SHEET SO THAT MAGNETIC MEMORY ELEMENTS ARE FORMED WHICH ARE SEPARTE FROM EACH OTHER AND FROM THE SHEET BUT ARE HELD IN PLACE BY SAID ETCH RESISTANT MATERIAL, APPLYING A COATING OF A RESINOUS RE-
Claim 2
Dependent Claim
108 words
IN THE METHOD OF PRODUCING A SHEET ARRAY OF MEMORY ELEMENTS, THE STEPS OF APPLYING A LAYER OF A RESINOUS ETCH RESISTANT MATERIAL ON BOTH SIDES OF A SHEET OF MAGNETIC METAL IN A PATTERN PERMITTING THE ETCHING OF APERTURES FROM BOTH SIDES OF THE SHEET AND PERMITTING THE ETCHING FROM ONE SIDE OF THE SHEET OF GAPS SURROUNDING AT LEAST ONE APERTURE AND DEFINING MEMORY ELEMENTS, ETCHING APERTURES AND GAPS IN SAID SHEET SO THAT MAGNETIC MEMORY ELEMENTS ARE FORMED WHICH ARE SEPARTE FROM EACH OTHER AND FROM THE SHEET BUT ARE HELD IN PLACE BY SAID ETCH RESISTANT MATERIAL, APPLYING A COATING OF A RESINOUS RE-
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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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |