US2138549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arch type electrical road switch
Assignee: Individual
•
Filing: 1938-05-02
•
Granted: 1938-11-29
•
Expires: 1958-05-02
Abstract
No abstract record available.
Inventors
- 👤 Bell Oldric J La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:20
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/14; H01H3/141; H01H3/142; G; G08; G08G; G08G1/00; G08G1/01; G08G1/02; H01B; H01B7/00; H01B7/10
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) | 1941-11-28 | 1942-05-30 | 1942-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-28 | 1946-05-30 | 1946-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-28 | 1950-05-30 | 1950-11-29 | $7700.00 | Window Closed / Lapsed |