Patent US2444198A successfully refreshed from Google Patents.
US2444198A
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Hermetically sealed electromagnetic relay
Assignee: Cook Electric Co
•
Filing: 1944-04-01
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Granted: 1948-06-29
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Expires: 1964-04-01
Abstract
No abstract record available.
Inventors
- 👤 Walter C Hasselhorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:47
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/29; H01H50/00; H01H50/02; H01H50/023; H01H50/04; H01H50/047; H01H50/048; H01H50/64; H01H50/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |