Patent US2082979A successfully refreshed from Google Patents.
US2082979A
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Variable resistance device
Assignee: CHICAGO TELEPHONE SUPPLY Co
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Filing: 1934-05-28
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Granted: 1937-06-08
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Expires: 1954-05-28
Abstract
No abstract record available.
Inventors
- 👤 Newton C Schellenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:26
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/14; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5611; Y10T70/5646; Y10T70/70; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7836; Y10T70/7842; Y10T70/7859; Y10T70/7864
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) | 1940-06-07 | 1940-12-07 | 1941-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-06-07 | 1944-12-07 | 1945-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-06-07 | 1948-12-07 | 1949-06-08 | $7700.00 | Window Closed / Lapsed |