US3522692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas scrubber
Assignee: Dustex Corp
•
Filing: 1968-01-23
•
Granted: 1970-08-04
•
Expires: 1988-01-23
Abstract
No abstract record available.
Inventors
- 👤 Roger S Brookman
- 👤 Gerald H Beach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:47
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1493110A
Cited
US1493579A
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US2008800A
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US2146071A
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US2453447A
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US2523441A
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US2676670A
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US2649924A
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US2668754A
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US2927659A
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US3293174A
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US3144315A
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US3250059A
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US3266227A
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US3171820A
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US3260036A
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US3220707A
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US3336733A
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US3349546A
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US3409409A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |