Patent US4170325A successfully refreshed from Google Patents.
Patent US3052086A successfully refreshed from Google Patents.
US3052086A
Expired / Lapsed
US
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Tuned exhaust for outboard motors
Assignee: Kiekhaefer Corp
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Filing: 1960-06-06
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Granted: 1962-09-04
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Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Kiekhaefer Elmer Carl
- 👤 Charles D Strang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:50
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/12; F02; F02B; F02B27/00; F02B27/04; F02B61/00; F02B61/04; F02B61/045; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |