Patent JPS6096023A successfully refreshed from Google Patents.
US2152006A
Expired / Lapsed
US
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Method of producing articles of hadfield manganese steel
Assignee: FIRTH STERLING STEEL CO
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Filing: 1937-03-31
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Granted: 1939-03-28
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Expires: 1957-03-31
Abstract
No abstract record available.
Inventors
- 👤 Elmer B Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-03-27 | 1942-09-26 | 1943-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-03-27 | 1946-09-26 | 1947-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-03-27 | 1950-09-26 | 1951-03-28 | $7700.00 | Window Closed / Lapsed |