US2481033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selector-stepper switch
Assignee: Guardian Electric Manufacturing Co
•
Filing: 1944-04-17
•
Granted: 1949-09-06
•
Expires: 1964-04-17
Abstract
No abstract record available.
Inventors
- 👤 Marvin G Nelsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:57
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/20; H04Q1/22; H04Q1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB406111A
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US2154994A
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US2324474A
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US2400088A
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US2327792A
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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) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |