US2449888A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor drive control
Assignee: Old Carco LLC
•
Filing: 1944-09-11
•
Granted: 1948-09-21
•
Expires: 1964-09-11
Abstract
No abstract record available.
Inventors
- 👤 Franklin W Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:46
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US643413A
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US704574A
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US1833987A
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US1820035A
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US2090401A
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US2193837A
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US2193836A
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US2187569A
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US2320432A
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US2292349A
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US2286778A
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US2396000A
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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) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |