US2630685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defrosting arrangement for refrigeration systems
Assignee: Carrier Corp
•
Filing: 1949-01-19
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Granted: 1953-03-10
•
Expires: 1969-01-19
Abstract
No abstract record available.
Inventors
- 👤 Lewis Leo Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:03
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25D; F25D21/00; F25D21/06; F25D21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1819510A
Cited
US1970340A
Cited
US2001028A
Cited
US2452102A
Cited
US2430938A
Cited
US2430960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |