US2071119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for treating furnace gases and exhaust gases from internal combustion engines
Assignee: Individual
•
Filing: 1933-05-12
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Granted: 1937-02-16
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Expires: 1953-05-12
Abstract
No abstract record available.
Inventors
- 👤 Harger John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/92; B01D53/94; B01D53/944; F01N13/00; F01N13/009; F01N13/0097; F01N3/02; F01N3/2013; F01N3/24; F01N3/28; F01N3/2803; F01N3/2832; F01N3/2839; F01N3/2846; F01N3/30; F01N3/34; F01N13/14; F01N2240/00; F01N2240/02; F01N2310/00; F01N2310/06; F01N2330/00; F01N2330/08; F01N2330/14; F01N2350/00; F01N2350/08; F01N2450/00; F01N2450/04; F01N2470/00; F01N2470/30; F01N2510/00; F01N2510/06; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-02-16 | 1940-08-17 | 1941-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-02-16 | 1944-08-17 | 1945-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-02-16 | 1948-08-17 | 1949-02-16 | $7700.00 | Window Closed / Lapsed |