Patent US2834061A successfully refreshed from Google Patents.
US2834061A
Expired / Lapsed
US
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Pneumatic fiber cleaning apparatus
Assignee: Lummus Industries Inc Co
•
Filing: 1954-05-07
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Granted: 1958-05-13
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Expires: 1974-05-07
Abstract
No abstract record available.
Inventors
- 👤 Donald W Van Doorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:19
CPC Classifications
D; D01; D01G; D01G9/00; D01G9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1023750A
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US1333127A
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US1505741A
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US1624518A
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US1861247A
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US2681476A
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US2681477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |