US2850607A
Expired / Lapsed
US
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Variable resistor constructions
Assignee: BOURNS LAB Inc
•
Filing: 1954-12-13
•
Granted: 1958-09-02
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Expires: 1974-12-13
Abstract
No abstract record available.
Inventors
- 👤 Marlan E Bourns
- 👤 Marvin E Harrison
- 👤 Wilbur T Hardison
- 👤 Alfred W Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:20
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/30; H01C10/38
Claims Analysis
Total Claims: 0
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US2668218A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |