Patent US2794243A successfully refreshed from Google Patents.
US2794243A
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US
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Method of brazing corrugated fins to flat tubing
Assignee: Motors Liquidation Co
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Filing: 1953-04-21
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Granted: 1957-06-04
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Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Edmund F Schweller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:23
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/0008; B23K1/0012; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T29/49393
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1508342A
Cited
US2268369A
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US2332368A
Cited
US2298895A
Cited
US2366164A
Cited
US2414159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |