US3462947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system for two-stroke engines
Assignee: Individual
•
Filing: 1968-11-15
•
Granted: 1969-08-26
•
Expires: 1988-11-15
Abstract
No abstract record available.
Inventors
- 👤 Klaus Frederick Nowak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:13
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/08; F01N1/083; F01N1/084; F02; F02B; F02B27/00; F02B27/04; F01N2470/00; F01N2470/18; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1778101A
Cited
US3385052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-25 | 1973-02-24 | 1973-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-25 | 1977-02-24 | 1977-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-25 | 1981-02-24 | 1981-08-26 | $7700.00 | Window Closed / Lapsed |