US2902684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling system
Assignee: International Business Machines Corp
•
Filing: 1956-08-08
•
Granted: 1959-09-01
•
Expires: 1976-08-08
Abstract
No abstract record available.
Inventors
- 👤 Ralph G Mork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/04; H04L7/08; G; G09; G09G; G09G1/00; G09G1/22
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |