US2443581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerant flow control means
Assignee: SPOEHRER LANGE CO Inc
•
Filing: 1944-10-30
•
Granted: 1948-06-15
•
Expires: 1964-10-30
Abstract
No abstract record available.
Inventors
- 👤 Harold T Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:56
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; F25B41/31; F25B41/33; F25B41/335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US920392A
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US2019724A
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US2191925A
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US2236191A
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US2258458A
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US2304316A
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US2320055A
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US2319993A
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US2367305A
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US2410795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |