Patent US3451128A successfully refreshed from Google Patents.
US3451128A
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US
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Method of making fine line patterns using a ferromagnetic element
Assignee: International Business Machines Corp
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Filing: 1964-12-30
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Granted: 1969-06-24
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Expires: 1984-12-30
Abstract
No abstract record available.
Inventors
- 👤 Leonard J Reed
- 👤 John R Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:25
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/10; H05K3/102; G; G03; G03G; G03G19/00; G03G5/00; G03G5/16; G11; G11B; G11B5/00; G11B5/62; H05K1/00; H05K1/02; H05K1/0286; H05K1/0287; H05K1/0289; H05K2203/00; H05K2203/05; H05K2203/0502; H05K2203/052; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/49764; Y10T29/49778; Y10T29/4978
Claims Analysis
Total Claims: 0
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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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |