Patent US2492176A successfully refreshed from Google Patents.
US2492176A
Expired / Lapsed
US
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Method of making closure plugs
Assignee: American Flange and Manufacturing Co Inc
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Filing: 1944-05-05
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Granted: 1949-12-27
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Expires: 1964-05-05
Abstract
No abstract record available.
Inventors
- 👤 Walter J O'connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B65; B65D; B65D39/00; B65D39/08; B65D39/082; B65D39/088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1778540A
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US1743544A
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US1819493A
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US2254005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |