Patent US1733087A successfully refreshed from Google Patents.
US2825784A
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US
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Electromagnetic relay
Assignee: BARTH ENGINEERING AND Manufacturing CO I
•
Filing: 1955-04-12
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Granted: 1958-03-04
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Expires: 1975-04-12
Abstract
No abstract record available.
Inventors
- 👤 Bertil S Bengtsson
- 👤 Robert D Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:07
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/30
Claims Analysis
Total Claims: 0
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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) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |