US2887674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse width memory units
Assignee: MARCHANT RES Inc
•
Filing: 1953-05-14
•
Granted: 1959-05-19
•
Expires: 1973-05-14
Abstract
No abstract record available.
Inventors
- 👤 George B Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/14; G11B20/1403; G11B20/1407; G11B20/1411
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1968078A
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US2094733A
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US2131322A
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US2540654A
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US2658950A
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US2734186A
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US2721989A
Cited
US2633402A
Cited
US2658946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |