US2038313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas purifier
Assignee: Individual
•
Filing: 1934-05-09
•
Granted: 1936-04-21
•
Expires: 1954-05-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Steve F Placko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:25
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30; Y10S60/00; Y10S60/902
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) | 1939-04-21 | 1939-10-21 | 1940-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-04-21 | 1943-10-21 | 1944-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-04-21 | 1947-10-21 | 1948-04-21 | $7700.00 | Window Closed / Lapsed |