US2669099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Evaporator construction for heat exchange systems
Assignee: Kramer Trenton Co
•
Filing: 1950-12-29
•
Granted: 1954-02-16
•
Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Malkoff Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:15
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2158792A
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US2054404A
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US2195781A
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US2133950A
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US2165004A
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US2279787A
Cited
US2293532A
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US2329139A
Cited
US2529215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |