Patent US2826077A successfully refreshed from Google Patents.
US2826077A
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US
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Sampling apparatus
Assignee: ChampionX LLC
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Filing: 1953-05-27
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Granted: 1958-03-11
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Expires: 1973-05-27
Abstract
No abstract record available.
Inventors
- 👤 Alfred O Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:04
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US66387A
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US379564A
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US906560A
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US1137580A
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US1266663A
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US1787112A
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US2053698A
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DE640076C
Cited
US2344778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-10 | 1961-09-09 | 1962-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-10 | 1965-09-09 | 1966-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-10 | 1969-09-09 | 1970-03-11 | $7700.00 | Window Closed / Lapsed |