Patent US2822853A successfully refreshed from Google Patents.
US2822853A
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US
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Flange forming apparatus with provision for ready insertion and removal of the work
Assignee: Surface Combustion Corp
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Filing: 1953-11-18
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Granted: 1958-02-11
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Expires: 1973-11-18
Abstract
No abstract record available.
Inventors
- 👤 Leo M Weinandy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:42
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/26; B21D53/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |