US2662273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making heat exchange structures
Assignee: Motors Liquidation Co
•
Filing: 1950-03-24
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Granted: 1953-12-15
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Expires: 1970-03-24
Abstract
No abstract record available.
Inventors
- 👤 George R Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:08
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/12; F28F3/14; B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; B23; B23K; B23K20/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE401476C
Cited
US1723659A
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US1709865A
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GB304689A
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US1847176A
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US1994903A
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US2212481A
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US2582358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |