Patent US2472320A successfully refreshed from Google Patents.
US2472320A
Expired / Lapsed
US
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Method of heat-treating steel
Assignee: Ford Motor Co
•
Filing: 1941-02-05
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Granted: 1949-06-07
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Expires: 1961-02-05
Abstract
No abstract record available.
Inventors
- 👤 Vennerholm Gosta
- 👤 Harry D Ford
- 👤 Frederick C Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:48
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24; C23C8/26; Y; Y10; Y10S; Y10S417/00; Y10S417/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1745104A
Cited
US2114802A
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US1995314A
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GB419057A
Cited
GB443524A
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US2102539A
Cited
US2188226A
Cited
US2151190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |