Patent CH53919A successfully refreshed from Google Patents.
Patent US2409825A successfully refreshed from Google Patents.
US2409825A
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US
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Process for purifying exhaust gases
Assignee: Individual
•
Filing: 1942-12-08
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Granted: 1946-10-22
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Expires: 1962-12-08
Abstract
No abstract record available.
Inventors
- 👤 Baringoltz Bernardo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:14
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; F; F01; F01N; F01N13/00; F01N13/009; F01N13/0097; F01N3/00; F01N3/08; F01N3/0807; F01N3/0814; F01N3/10; F01N3/24; F01N3/28; F01N3/2839; F01N3/2846; F01N3/2882; F01N2240/00; F01N2240/06; F01N2240/18; F01N2250/00; F01N2250/12; F01N2370/00; F01N2370/22; F01N2450/00; F01N2450/24; F01N2510/00; F01N2510/06; F01N3/02; F01N3/021; Y; 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) | 1949-10-21 | 1950-04-22 | 1950-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-21 | 1954-04-22 | 1954-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-21 | 1958-04-22 | 1958-10-22 | $7700.00 | Window Closed / Lapsed |