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US2917823A
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US
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Method of cold forming tubular bodies having internal undercut grooves
Assignee: Motors Liquidation Co
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Filing: 1957-12-09
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Granted: 1959-12-22
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Expires: 1977-12-09
Abstract
No abstract record available.
Inventors
- 👤 Fletcher William Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:04
CPC Classifications
B; B21; B21K; B21K21/00; B21D; B21D22/00; B21D22/20; B21D22/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2642647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |