US2797904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple venturi scrubber
Assignee: Individual
•
Filing: 1953-11-27
•
Granted: 1957-07-02
•
Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 James T Voorheis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:50
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/02; F23J15/04; B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3121; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1385884A
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US1608416A
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US1741519A
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US1803956A
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US1810131A
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US2088691A
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US2215707A
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US2519618A
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US2523126A
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US2702699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |