Patent US5549617A successfully refreshed from Google Patents.
US2167539A
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Method of making flanged cylinders
Assignee: General Electric Co
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Filing: 1937-12-28
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Granted: 1939-07-25
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Expires: 1957-12-28
Abstract
No abstract record available.
Inventors
- 👤 Jacob J Vienneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:48
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/36; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/046; B29C57/00; B31F1/008; H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/324; H01F27/325; Y; Y10; Y10S; Y10S29/00; Y10S29/024
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) | 1942-07-24 | 1943-01-23 | 1943-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-07-24 | 1947-01-23 | 1947-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-07-24 | 1951-01-23 | 1951-07-25 | $7700.00 | Window Closed / Lapsed |