US1501437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical signaling apparatus
Assignee: BUILDERS IRON FOUNDRY
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Filing: 1920-02-05
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Granted: 1924-07-15
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Expires: 1940-02-05
Abstract
No abstract record available.
Inventors
- 👤 Frederick N Connet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:25
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/38; Y; Y10; Y10S; Y10S261/00; Y10S261/40; Y10T; Y10T137/00; Y10T137/8158; Y10T137/8225; Y10T137/8242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1927-07-15 | 1928-01-14 | 1928-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-07-15 | 1932-01-14 | 1932-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-07-15 | 1936-01-14 | 1936-07-15 | $7700.00 | Window Closed / Lapsed |