US2431583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical connection means
Assignee: H A DOUGLAS Manufacturing Co
•
Filing: 1942-01-12
•
Granted: 1947-11-25
•
Expires: 1962-01-12
Abstract
No abstract record available.
Inventors
- 👤 Charles S Penfold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:43
CPC Classifications
H; H01; H01R; H01R31/00; H01R13/00; H01R13/02; H01R13/10; H01R13/11; H01R13/111; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204
Claims Analysis
Total Claims: 0
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US2257317A
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US2318648A
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US2299787A
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US2291434A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-24 | 1951-05-26 | 1951-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-24 | 1955-05-26 | 1955-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-24 | 1959-05-26 | 1959-11-25 | $7700.00 | Window Closed / Lapsed |