Patent US2689463A successfully refreshed from Google Patents.
US2689463A
Expired / Lapsed
US
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Charging refrigerating apparatus
Assignee: Motors Liquidation Co
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Filing: 1953-02-12
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Granted: 1954-09-21
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Expires: 1973-02-12
Abstract
No abstract record available.
Inventors
- 👤 Herman R Arf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:13
CPC Classifications
F; F25; F25B; F25B45/00; F25B2345/00; F25B2345/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |