Patent US2938987A successfully refreshed from Google Patents.
US2938987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple switch control
Assignee: Individual
•
Filing: 1957-02-19
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Granted: 1960-05-31
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Expires: 1977-02-19
Abstract
No abstract record available.
Inventors
- 👤 Franklin M Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:43
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/16; H01H9/165; G; G05; G05G; G05G9/00; G05G9/10; H01H3/00; H01H3/32; H01H3/36; H01H3/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1743357A
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US793047A
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US1106593A
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US1753505A
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US1940930A
Cited
US2501415A
Cited
US2614181A
Cited
US2603725A
Cited
FR1031777A
Cited
US2676235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |