US2802543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating smoke and gases
Assignee: Individual
•
Filing: 1953-12-24
•
Granted: 1957-08-13
•
Expires: 1973-12-24
Abstract
No abstract record available.
Inventors
- 👤 Chester L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:17
CPC Classifications
F; F23; F23J; F23J15/00; F23J15/02; F23J15/04; B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; B01D45/10; Y; Y10; Y10S; Y10S261/00; Y10S261/09
Claims Analysis
Total Claims: 0
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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) | 1960-08-12 | 1961-02-11 | 1961-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-12 | 1965-02-11 | 1965-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-12 | 1969-02-11 | 1969-08-13 | $7700.00 | Window Closed / Lapsed |