Patent US2428825A successfully refreshed from Google Patents.
US2428825A
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US
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Method of controlling distortion, straightening distorted objects, and/or altering the shape of metal objects
Assignee: Linde Air Products Co
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Filing: 1941-02-27
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Granted: 1947-10-14
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Expires: 1961-02-27
Abstract
No abstract record available.
Inventors
- 👤 Roman F Arnoldy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
B; B21; B21D; B21D3/00; C; C21; C21D; C21D1/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49348
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1688300A
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US1535007A
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US2124459A
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GB441329A
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GB468626A
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GB490514A
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US2227476A
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US2254307A
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US2281332A
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US2280102A
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US2265275A
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US2245273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-13 | 1951-04-14 | 1951-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-13 | 1955-04-14 | 1955-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-13 | 1959-04-14 | 1959-10-14 | $7700.00 | Window Closed / Lapsed |