Patent US2837289A successfully refreshed from Google Patents.
US2837289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tumbler barrel for impact cleaning of metal scrap
Assignee: Enviri Corp
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Filing: 1955-09-12
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Granted: 1958-06-03
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Expires: 1975-09-12
Abstract
No abstract record available.
Inventors
- 👤 Eric H Heckett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:00
CPC Classifications
B; B03; B03B; B03B9/00; B03B9/06; B03B9/061
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US401878A
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US1859560A
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US688229A
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US957436A
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US1367777A
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US1966312A
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US1934930A
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US2148529A
Cited
US2189711A
Cited
US2264204A
Cited
US2530862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-02 | 1961-12-02 | 1962-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-02 | 1965-12-02 | 1966-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-02 | 1969-12-02 | 1970-06-03 | $7700.00 | Window Closed / Lapsed |