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Patent US2415497A successfully refreshed from Google Patents.
US2415497A
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Volume control construction
Assignee: International Resistance Co
•
Filing: 1944-08-18
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Granted: 1947-02-11
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Expires: 1964-08-18
Abstract
No abstract record available.
Inventors
- 👤 Esmond E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:04
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/32; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636; Y10T74/2066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US784272A
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US1481669A
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US1509523A
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US1588039A
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US1574715A
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US1780172A
Cited
DE546462C
Cited
US2157091A
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US2354581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-10 | 1950-08-12 | 1951-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-10 | 1954-08-12 | 1955-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-10 | 1958-08-12 | 1959-02-11 | $7700.00 | Window Closed / Lapsed |