Patent US2304817A successfully refreshed from Google Patents.
US2249977A
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US
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Electrical connection means
Assignee: H A DOUGLAS Manufacturing Co
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Filing: 1939-12-05
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Granted: 1941-07-22
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Expires: 1959-12-05
Abstract
No abstract record available.
Inventors
- 👤 Charles S Penfold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:59
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; H01H11/06; H01H15/00; H01H15/02; H01H15/04; H01R; H01R13/00; H01R13/66; H01R13/70; H01R9/00; H01R9/16; H01H2011/062
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) | 1944-07-21 | 1945-01-20 | 1945-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-07-21 | 1949-01-20 | 1949-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-07-21 | 1953-01-20 | 1953-07-22 | $7700.00 | Window Closed / Lapsed |