US2977178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer memory section improvements
Assignee: Alwac International Inc
•
Filing: 1953-08-18
•
Granted: 1961-03-28
•
Expires: 1973-08-18
Abstract
No abstract record available.
Inventors
- 👤 Albert S Hook
- 👤 Estates Palos Verdes
- 👤 Goodman Hazen Kenneth
- 👤 George L Hutter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:54
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/74; G11B5/76
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2185300A
Cited
US2566441A
Cited
US2629827A
Cited
GB657494A
Cited
US2540654A
Cited
US2617705A
Cited
US2635229A
Cited
US2708693A
Cited
US2772135A
Cited
US2674732A
Cited
US2674733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |