US3434268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust gas filter system
Assignee: MARSHALL J MCKENZIE
•
Filing: 1967-07-25
•
Granted: 1969-03-25
•
Expires: 1987-07-25
Abstract
No abstract record available.
Inventors
- 👤 Marshall J Mckenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:32
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/022; F01N3/0226; F01N2240/00; F01N2240/18; F01N2240/20; F01N2330/00; F01N2330/10; F01N2330/101; F01N2330/102; F01N2450/00; F01N2450/30; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1323048A
Cited
US1522111A
Cited
US1867325A
Cited
US1953785A
Cited
US2077563A
Cited
US2231076A
Cited
US2299364A
Cited
US2569575A
Cited
US2795103A
Cited
US3114617A
Cited
US3108866A
Cited
US3305509A
Cited
US3293830A
Cited
US3326198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |