US3249933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic bell device for railroad locomotive
Assignee: Welding Service Inc
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Filing: 1963-03-06
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Granted: 1966-05-03
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Expires: 1983-03-06
Abstract
No abstract record available.
Inventors
- 👤 Richard W Mckee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:57
CPC Classifications
G; G08; G08B; G08B3/00; G08B3/10; B; B61; B61L; B61L5/00; B61L5/20
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |