Patent US2579523A successfully refreshed from Google Patents.
US2579523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph relay
Assignee: International Standard Electric Corp
•
Filing: 1948-02-12
•
Granted: 1951-12-25
•
Expires: 1968-02-12
Abstract
No abstract record available.
Inventors
- 👤 Terry Victor John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:07
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US255378A
Cited
US544351A
Cited
US2455049A
Cited
US781416A
Cited
US1279168A
Cited
US2082493A
Cited
US2445401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |