Patent US2430733A successfully refreshed from Google Patents.
US2430733A
Expired / Lapsed
US
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Device for removing tubes from heat exchange assemblies
Assignee: ConocoPhillips Co
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Filing: 1944-02-07
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Granted: 1947-11-11
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Expires: 1964-02-07
Abstract
No abstract record available.
Inventors
- 👤 Frank M Paxson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:57
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53909; Y10T29/5393; Y10T407/00; Y10T407/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US689742A
Cited
US1276458A
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US1370837A
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US1432410A
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US1471062A
Cited
US2215616A
Cited
US2176626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |