Patent US2796239A successfully refreshed from Google Patents.
US2796239A
Expired / Lapsed
US
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Heat exchanger
Assignee: Motors Liquidation Co
•
Filing: 1951-12-20
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Granted: 1957-06-18
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Expires: 1971-12-20
Abstract
No abstract record available.
Inventors
- 👤 Holmes John Ralph
- 👤 John W Godfrey
- 👤 Robert F Caughill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:55
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/12; F28D; F28D1/00; F28D1/02; F28D1/0206; F28D1/0213; F28D9/00; F28D9/0031; F28D9/0037; F16; F16H; F16H57/00; F16H57/04; F16H57/0412; F16H57/0415; F16H57/0417; F16H57/045; F16H57/0452; F28F2250/00; F28F2250/10; F28F2250/102; Y; Y10; Y10S; Y10S165/00; Y10S165/355; Y10S165/356; Y10S60/00; Y10S60/912
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US753031A
Cited
US998876A
Cited
US1003826A
Cited
US1563402A
Cited
US1696881A
Cited
US1653427A
Cited
US1713541A
Cited
US1910696A
Cited
US2054403A
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US2063436A
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US2193304A
Cited
US2164173A
Cited
US2222496A
Cited
US2288061A
Cited
US2325647A
Cited
US2453877A
Cited
US2435041A
Cited
US2565816A
Cited
US2500501A
Cited
US2511084A
Cited
US2577188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |