US1855165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for muffling and purifying exhaust gases
Assignee: Individual
•
Filing: 1926-06-04
•
Granted: 1932-04-19
•
Expires: 1946-06-04
Abstract
No abstract record available.
Inventors
- 👤 Barker Maurice Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:48
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/30; F01N3/32; B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; F01N3/18; F01N3/22; F01N3/28; F01N3/2803; F01N2230/00; F01N2230/04; F01N2450/00; F01N2450/24; F01N2470/00; F01N2470/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1935-04-19 | 1935-10-19 | 1936-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-04-19 | 1939-10-19 | 1940-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-04-19 | 1943-10-19 | 1944-04-19 | $7700.00 | Window Closed / Lapsed |