Patent US2884619A successfully refreshed from Google Patents.
US2884619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information storage system
Assignee: International Business Machines Corp
•
Filing: 1953-09-02
•
Granted: 1959-04-28
•
Expires: 1973-09-02
Abstract
No abstract record available.
Inventors
- 👤 William W Woodbury
- 👤 Lewis T Wheelock
- 👤 Gregory J Toben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/23
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1946223A
Cited
US2024979A
Cited
US2459724A
Cited
US2512038A
Cited
US2750532A
Cited
US2609143A
Cited
US2755994A
Cited
US2701095A
Cited
US2767908A
Cited
US2639859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |