Patent US430808A successfully refreshed from Google Patents.
Patent US2980993A successfully refreshed from Google Patents.
US2980993A
Expired / Lapsed
US
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Method of and apparatus for forming flanged casing bottom
Assignee: Individual
•
Filing: 1956-08-10
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Granted: 1961-04-25
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Expires: 1976-08-10
Abstract
No abstract record available.
Inventors
- 👤 Lyon George Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:21
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US202363A
Cited
US592095A
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US651884A
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US1623059A
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US1984751A
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DE700207C
Cited
FR903985A
Cited
US2668345A
Cited
US2805466A
Cited
US2751676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |