US2428993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Motors Liquidation Co
•
Filing: 1943-12-11
•
Granted: 1947-10-14
•
Expires: 1963-12-11
Abstract
No abstract record available.
Inventors
- 👤 Wilton F Reichelderfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:43
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/24; F28D; F28D7/00; F28D7/10; F28D7/106; F28F13/00; F28F13/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1118237A
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US1147279A
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US1752670A
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US1854619A
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GB371608A
Cited
DE623268C
Cited
US2112743A
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US2016746A
Cited
GB430015A
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US2082899A
Cited
US2157744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |