Patent US114816A successfully refreshed from Google Patents.
Patent US3348153A successfully refreshed from Google Patents.
Patent US3504348A successfully refreshed from Google Patents.
US3504348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transfer controller
Assignee: Unisys Corp
•
Filing: 1967-07-03
•
Granted: 1970-03-31
•
Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Henry R Hallman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:05
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/06; G06F3/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2905930A
Cited
US2931014A
Cited
US2978678A
Cited
US3228004A
Cited
US3121860A
Cited
US3183489A
Cited
US3229080A
Cited
US3287704A
Cited
US3334181A
Cited
US3340515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |