US3490204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaning scrubber
Assignee: Combustion Engineering Inc
•
Filing: 1967-12-26
•
Granted: 1970-01-20
•
Expires: 1987-12-26
Abstract
No abstract record available.
Inventors
- 👤 Peter W Kalika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:58
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; Y; Y10; Y10S; Y10S261/00; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2579282A
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GB694404A
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US2781251A
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US2729301A
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US2887390A
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US3113168A
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US3016981A
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US3237381A
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US3221475A
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US3367402A
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US3372528A
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US3315443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |