US2871328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preset type variable resistor
Assignee: CHICAGO TELEPHONE SUPPLY Corp
•
Filing: 1955-08-31
•
Granted: 1959-01-27
•
Expires: 1975-08-31
Abstract
No abstract record available.
Inventors
- 👤 Wilbert H Budd
- 👤 Jr Howard F Christner
- 👤 Wayne A Barden
- 👤 Joel L Kehres
- 👤 Arthur M Daily
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:55
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE56943C
Cited
US1157868A
Cited
US2250959A
Cited
US2242327A
Cited
US2253318A
Cited
US2484734A
Cited
US2625633A
Cited
US2644064A
Cited
US2668218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |