Patent US3553661A successfully refreshed from Google Patents.
US3553661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
First-in, first-out memory
Assignee: United States Department of the Army
•
Filing: 1967-06-27
•
Granted: 1971-01-05
•
Expires: 1987-06-27
Abstract
Abstract A FIRST-IN, FIRST-OUT STORAGE DEVICE IN WHICH THE FIRST-IN, FIRST-OUT FUNCTION IS PERFORMED BY WRITING INFORMATION IN THE FORM OF A MAGNETIC DOMAIN INTO AN UNKNOWN LOCATION IN A DATA REGISTR OF THE MAGNETIC FILM TYPE UNDER THE INFLUENCE OF A MARKER MAGNETIC DOMAIN DISPOSED IN A CONTIGUOUS REGISTER.
Inventors
- 👤 David R Hadden Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |