US2521247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of refrigeration
Assignee: Honeywell Inc
•
Filing: 1941-01-13
•
Granted: 1950-09-05
•
Expires: 1961-01-13
Abstract
No abstract record available.
Inventors
- 👤 Alwin B Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:04
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/025; F25B2600/00; F25B2600/02; F25B2600/025; F25B2600/0251
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1162071A
Cited
US1728038A
Cited
US1560932A
Cited
US1703235A
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US1802679A
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US1908193A
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US2138509A
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US2081853A
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US2014386A
Cited
US2362207A
Cited
US1979779A
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US2028077A
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US2080169A
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US2165518A
Cited
US2189381A
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US2090526A
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US2216589A
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US2218944A
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US2273127A
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US2247060A
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US2213505A
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US2226297A
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US2308261A
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US2270353A
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US2308313A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |