US1520503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling for electrical conductors
Assignee: Individual
•
Filing: 1923-04-19
•
Granted: 1924-12-23
•
Expires: 1943-04-19
Abstract
No abstract record available.
Inventors
- 👤 David B Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:00
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/56; H01R4/28; H01R4/30; H01R4/32; H01R4/50; H01R4/5033; Y; Y10; Y10T; Y10T403/00; Y10T403/36; Y10T403/364; Y10T403/368; Y10T403/67
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) | 1927-12-23 | 1928-06-23 | 1928-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-12-23 | 1932-06-23 | 1932-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-12-23 | 1936-06-23 | 1936-12-23 | $7700.00 | Window Closed / Lapsed |