Patent US2685293A successfully refreshed from Google Patents.
US2685293A
Expired / Lapsed
US
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Apparatus for cleaning tube bundles
Assignee: Standard Oil Development Co
•
Filing: 1948-12-31
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Granted: 1954-08-03
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Expires: 1968-12-31
Abstract
No abstract record available.
Inventors
- 👤 Dauphinee Enna Elm
- 👤 Antenbring Stanley Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:29
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1403999A
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US1928621A
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CH145431A
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US1952848A
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US2040715A
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US2200587A
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US2258562A
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US2225946A
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US2289967A
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US2395160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |