Patent US2839397A successfully refreshed from Google Patents.
US2839397A
Expired / Lapsed
US
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Method of forming subdensity metal bodies
Assignee: Ortech Corp
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Filing: 1954-02-24
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Granted: 1958-06-17
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Expires: 1974-02-24
Abstract
No abstract record available.
Inventors
- 👤 Cavanagh Partrick Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:46
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; Y; Y10; Y10S; Y10S75/00; Y10S75/962; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12021
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
46 words
THE METHOD OF FORMING A ROLLED FERROUS PRODUCT FOR A MAXIMUM DENSITY PORTION AND A PORTION BONDED IN SITU THERETO OF LESSER DENSITY, COMPRISING HOT ROLLING FOR SUBDENSITY FERROUS BODIES TO PRODUCE A MAXIMUM DENSITY PORTION FOR AN ELONGATION CHARACTERISTIC OF LESS THAN ABOUT TEN PERCENT.
References Cited (Backward Citations)
US194340A
Cited
US2152006A
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US2297817A
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US2260247A
Cited
GB645030A
Cited
US2637671A
Cited
US2686118A
Cited
US2898796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |