Patent US2531009A successfully refreshed from Google Patents.
US2531009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube end brushing apparatus
Assignee: General Electric Co
•
Filing: 1946-08-10
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Granted: 1950-11-21
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Expires: 1966-08-10
Abstract
No abstract record available.
Inventors
- 👤 Raymond H Stuart
- 👤 Reginald J Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:04
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1507596A
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US1474448A
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US1600096A
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GB509680A
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US2252787A
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US2295575A
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US2296801A
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US2267435A
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US2351262A
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US2413979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |