US2505574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling system
Assignee: RCA Corp
•
Filing: 1943-08-02
•
Granted: 1950-04-25
•
Expires: 1963-08-02
Abstract
No abstract record available.
Inventors
- 👤 Rankin John Argus
- 👤 Rufus-Alexander William
- 👤 Harmon B Deai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/12; G08C19/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2036165A
Cited
US2131558A
Cited
US2162335A
Cited
US2233183A
Cited
US2274648A
Cited
US2309678A
Cited
US2339608A
Cited
US2355338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |