US3439343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer memory testing system
Assignee: Singer General Precision Inc
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Filing: 1966-07-12
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Granted: 1969-04-15
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Expires: 1986-07-12
Abstract
No abstract record available.
Inventors
- 👤 Howard L Stahle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:28
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/22; G06F11/26; G06F11/273; G06F11/277; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1816
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) | 1972-04-14 | 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 |