US2787445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchange shelf
Assignee: FMC Corp
•
Filing: 1951-10-22
•
Granted: 1957-04-02
•
Expires: 1971-10-22
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Dungan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:08
CPC Classifications
F; F25; F25D; F25D13/00; F25D13/06; F25D13/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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DE585800C
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US1896693A
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US2074700A
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US2118910A
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US2227680A
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US2145308A
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US2210031A
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US2246448A
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US2458629A
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US2629233A
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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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |