Patent US1789812A successfully refreshed from Google Patents.
US1789812A
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Method of eliminating combustible constituents from the products of combustion of an internal-combustion engine
Assignee: Individual
•
Filing: 1929-08-12
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Granted: 1931-01-20
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Expires: 1949-08-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph C W Frazer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:28
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/2006; F01N3/2046; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; F01N3/02; F01N3/05; F01N3/2013; F01N3/204; F01N3/22; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N3/2882; F01N3/2889; F01N3/30; F01N3/34; F01N3/38; F01N2240/00; F01N2240/02; F01N2290/00; F01N2330/00; F01N2330/02; F01N2330/04; F01N2330/12; F01N2510/00; F01N2510/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1934-01-19 | 1934-07-21 | 1935-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-01-19 | 1938-07-21 | 1939-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-01-19 | 1942-07-21 | 1943-01-20 | $7700.00 | Window Closed / Lapsed |