US2492970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defrosting system
Assignee: Individual
•
Filing: 1943-10-06
•
Granted: 1950-01-03
•
Expires: 1963-10-06
Abstract
No abstract record available.
Inventors
- 👤 Herman H Curry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1955087A
Cited
US1760168A
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US1782688A
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US1866992A
Cited
US1862854A
Cited
US1891357A
Cited
GB410684A
Cited
US2089608A
Cited
US2045810A
Cited
US2291565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |