US2927369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making multiple passage heat exchanger
Assignee: Motors Liquidation Co
•
Filing: 1954-10-21
•
Granted: 1960-03-08
•
Expires: 1974-10-21
Abstract
No abstract record available.
Inventors
- 👤 William H Coblentz
- 👤 Donald W Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:42
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1391871A
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US1950500A
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US2012582A
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US2011854A
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US2063757A
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US2158383A
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US2514469A
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US2757628A
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US2746139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |