US2388564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal retarder switch unit
Assignee: McGraw Electric Co
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Filing: 1943-11-22
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Granted: 1945-11-06
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Expires: 1963-11-22
Abstract
No abstract record available.
Inventors
- 👤 Clark M Osterheld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:49
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/20; F24H9/2007; F24H9/2014; F24H9/2021; F24H15/00; F24H15/10; F24H15/168; F24H15/30; F24H15/355; F24H15/37; F24H15/40; F24H15/486; H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/46; H01H37/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-11-05 | 1949-05-07 | 1949-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-11-05 | 1953-05-07 | 1953-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-11-05 | 1957-05-07 | 1957-11-06 | $7700.00 | Window Closed / Lapsed |