Patent US2223103A successfully refreshed from Google Patents.
US2638320A
Expired / Lapsed
US
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Pipe cutter or reamer for use on crooked pipe
Assignee: Individual
•
Filing: 1949-06-18
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Granted: 1953-05-12
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Expires: 1969-06-18
Abstract
No abstract record available.
Inventors
- 👤 Elmo L Condra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:42
CPC Classifications
E; E21; E21B; E21B29/00; E21B29/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2014805A
Cited
US2072320A
Cited
US2218766A
Cited
US2299528A
Cited
GB617740A
Cited
US2538545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |