US3494339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning smog control filter and fire trap for internal combustion engines
Assignee: LAWRENCE M JUSTICE
•
Filing: 1967-06-14
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Granted: 1970-02-10
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Expires: 1987-06-14
Abstract
No abstract record available.
Inventors
- 👤 John Jame Fernandez
- 👤 Lawrence M Justice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:58
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/04; F01M13/02; F01M13/021; F01M13/022; F01M13/025; F01N; F01N3/00; F01N3/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1395932A
Cited
US1760315A
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US2125435A
Cited
US2354722A
Cited
US2458118A
Cited
US3151604A
Cited
US3170448A
Cited
US3234925A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |