US3518636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite memory device
Assignee: Boeing North American Inc
•
Filing: 1965-01-26
•
Granted: 1970-06-30
•
Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 George R Pulliam
- 👤 John L Archer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:38
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/0302; H01F1/0311; H01F1/0313; H01F1/0315; H01F10/00; H01F10/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2938183A
Cited
US3195108A
Cited
US3148079A
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US3189973A
Cited
US3308446A
Cited
US3399072A
Cited
US3337856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |