Patent US3448419A successfully refreshed from Google Patents.
US3448419A
Expired / Lapsed
US
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Weatherproof pushbutton key set employing sealed contacts operated by a permanent magnet
Assignee: International Standard Electric Corp
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Filing: 1966-09-15
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Granted: 1969-06-03
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Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 Edward Ronald Myatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:07
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0006; H01H36/004; H01H13/00; H01H13/02; H01H13/04; H01H13/06; H01H13/063; H01H9/00; H01H9/02; H01H9/04; H01H2009/048; H01H2013/066; H01H5/00; H01H5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |