Patent US2605377A successfully refreshed from Google Patents.
US2605377A
Expired / Lapsed
US
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Heat exchange method and apparatus
Assignee: Metal Carbides Corp
•
Filing: 1947-07-15
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Granted: 1952-07-29
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Expires: 1967-07-15
Abstract
No abstract record available.
Inventors
- 👤 William L Kaehni
- 👤 Frank J Kaehni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:28
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/16; F22; F22B; F22B1/00; F22B1/28; F22B1/281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US732616A
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US1854475A
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US1473347A
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US1835557A
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US1980521A
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GB429352A
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US1980821A
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US2018434A
Cited
US2264495A
Cited
US2362889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |