Patent US2481637A successfully refreshed from Google Patents.
US2481637A
Expired / Lapsed
US
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Combined milling tool and pipe puller
Assignee: A 1 Bit & Tool Co
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Filing: 1945-02-23
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Granted: 1949-09-13
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Expires: 1965-02-23
Abstract
No abstract record available.
Inventors
- 👤 John R Yancey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:28
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/002; E21B29/005; B; B23; B23D; B23D21/00; E21B31/00; E21B31/12; E21B31/16; E21B31/20
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) | 1952-09-12 | 1953-03-14 | 1953-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-12 | 1957-03-14 | 1957-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-12 | 1961-03-14 | 1961-09-13 | $7700.00 | Window Closed / Lapsed |