US2451176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture-proofed plunger snap switch
Assignee: Robert Hetherington & Son Inc
•
Filing: 1945-03-27
•
Granted: 1948-10-12
•
Expires: 1965-03-27
Abstract
No abstract record available.
Inventors
- 👤 Joseph H Schellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/04; H01H13/06; H01H9/00; H01H9/02; H01H9/04; H01H2009/048; H01H5/00; H01H5/04; H01H5/045; Y; Y10; Y10T; Y10T70/00; Y10T70/80; Y10T70/8432; Y10T70/8649; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/18896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE193595C
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US450292A
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US809262A
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US1222214A
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US1837185A
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US2202207A
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US2301874A
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US2367441A
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US2386162A
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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) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |