Patent US5748966A successfully refreshed from Google Patents.
Patent US1421200A successfully refreshed from Google Patents.
US2929040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination electric switch and variable resistor
Assignee: CHICAGO TELEPHONE SUPPLY Corp
•
Filing: 1958-06-12
•
Granted: 1960-03-15
•
Expires: 1978-06-12
Abstract
No abstract record available.
Inventors
- 👤 Wayne A Barden
- 👤 Mervin B Arisman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:30
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/32; H01C10/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |