Patent US2956140A successfully refreshed from Google Patents.
US2956140A
Expired / Lapsed
US
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Electromagnetic relay spring assembly
Assignee: International Standard Electric Corp
•
Filing: 1957-08-08
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Granted: 1960-10-11
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Expires: 1977-08-08
Abstract
No abstract record available.
Inventors
- 👤 Walter Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:13
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/38; H01H50/00; H01H50/54; H01H50/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1260665A
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US1795850A
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US2099639A
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US2282687A
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US2323642A
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US2612367A
Cited
US2737558A
Cited
US2739209A
Cited
US2782270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |