US2561278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable refrigerating apparatus
Assignee: CALUMET AND HECLA CONS COPPER
•
Filing: 1948-08-02
•
Granted: 1951-07-17
•
Expires: 1968-08-02
Abstract
No abstract record available.
Inventors
- 👤 Walter P Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:59
CPC Classifications
F; F25; F25D; F25D19/00; F25D19/02; F25B; F25B2400/00; F25B2400/05; F25B2400/052; F25B2400/054
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2056353A
Cited
US1831825A
Cited
US2362729A
Cited
US2082441A
Cited
US2191659A
Cited
US2115294A
Cited
GB582227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |