Patent US2443437A successfully refreshed from Google Patents.
US2443437A
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US
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Time-delay relay system
Assignee: American Brake Shoe Co
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Filing: 1943-10-12
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Granted: 1948-06-15
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Expires: 1963-10-12
Abstract
No abstract record available.
Inventors
- 👤 Rosser L Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:25
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/46; H02P5/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1553407A
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US1553408A
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US1835916A
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US2200128A
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US2254039A
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US2213368A
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US2216329A
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US2246516A
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US2232896A
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US2232753A
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US2322114A
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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) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |