US2567425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed signal system
Assignee: Individual
•
Filing: 1949-06-28
•
Granted: 1951-09-11
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Expires: 1969-06-28
Abstract
No abstract record available.
Inventors
- 👤 John R Dillon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:00
CPC Classifications
B; B61; B61L; B61L1/00; B61L1/20; B60; B60Q; B60Q1/00; B60Q1/26; B60Q1/50; B60Q1/54
Claims Analysis
Total Claims: 0
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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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |