Patent US2421652A successfully refreshed from Google Patents.
US2421652A
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Electrical conductor
Assignee: Sprague Electric Co
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Filing: 1943-08-02
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Granted: 1947-06-03
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Expires: 1963-08-02
Abstract
No abstract record available.
Inventors
- 👤 Robinson Preston
- 👤 Stanley O Dorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:12
CPC Classifications
C; C25; C25B; C25B13/00; H; H01; H01B; H01B3/00; H01B3/02; H01B3/04; H01B3/10; H01B3/105; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/296; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US333394A
Cited
US1926407A
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US1972162A
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US2084825A
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US2047209A
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GB465237A
Cited
US2216234A
Cited
US2327462A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-02 | 1950-12-02 | 1951-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-02 | 1954-12-02 | 1955-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-02 | 1958-12-02 | 1959-06-03 | $7700.00 | Window Closed / Lapsed |