US2540550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Art of refrigeration
Assignee: Carrier Corp
•
Filing: 1946-02-02
•
Granted: 1951-02-06
•
Expires: 1966-02-02
Abstract
No abstract record available.
Inventors
- 👤 Edward L Schulz
- 👤 Edward A Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:19
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335; F25B2600/00; F25B2600/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1591302A
Cited
US1836072A
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US2091787A
Cited
US2183343A
Cited
US2258458A
Cited
US2196778A
Cited
US2344215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |