Patent US2422526A successfully refreshed from Google Patents.
US2724104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring check circuit
Assignee: International Business Machines Corp
•
Filing: 1954-10-06
•
Granted: 1955-11-15
•
Expires: 1974-10-06
Abstract
No abstract record available.
Inventors
- 👤 Herbert K Wild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:47
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/30; G06F1/00; G06F1/04; G06F11/00; G06F11/07; G06F11/08; G06F11/085; H; H03; H03K; H03K23/00; H03K23/82
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |