US3535688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic buffer storage
Assignee: EIDP Inc
•
Filing: 1969-05-09
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Granted: 1970-10-20
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Expires: 1989-05-09
Abstract
No abstract record available.
Inventors
- 👤 Robert Kerr Waring Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:29
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09; G11; G11C; G11C13/00; G11C13/04; G11C13/06; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/86; H01J29/89; H01J2229/00; H01J2229/89; H01J2229/8926; H01J2229/893
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) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |