Patent US2737670A successfully refreshed from Google Patents.
US2737670A
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US
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Tapping tool
Assignee: Republic Steel Corp
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Filing: 1951-03-12
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Granted: 1956-03-13
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Expires: 1971-03-12
Abstract
No abstract record available.
Inventors
- 👤 Guy O Conner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:44
CPC Classifications
B; B23; B23G; B23G5/00; B23G5/02; B23G5/06; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1542893A
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US1525536A
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US1656592A
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GB253102A
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US1982738A
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US1982737A
Cited
US2300310A
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US2307680A
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US2330099A
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US2388779A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |