Patent US2557722A successfully refreshed from Google Patents.
US2557722A
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Method of forging hollow articles
Assignee: Individual
•
Filing: 1946-02-01
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Granted: 1951-06-19
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Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 Charles A Brauchler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:43
CPC Classifications
B; B21; B21K; B21K21/00; B21K21/16; B21J; B21J13/00; B21J13/02; B21J13/025; B21J5/00; B21J5/06; B21J5/12; B21K1/00; B21K1/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR396928A
Cited
US1625131A
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US1823158A
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US1929802A
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US1945092A
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GB371226A
Cited
US2040957A
Cited
US2340784A
Cited
US2452974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |