US3439087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making memory core plane
Assignee: Electronic Research Corp
•
Filing: 1966-07-27
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Granted: 1969-04-15
•
Expires: 1986-07-27
Abstract
No abstract record available.
Inventors
- 👤 Edward A Ledeen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:32
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3071843A
Cited
US2981932A
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US3213430A
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US3100295A
Cited
US3085899A
Cited
US3219557A
Cited
US3164814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |