Patent US3491849A successfully refreshed from Google Patents.
US3491849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust manifold cover
Assignee: Individual
•
Filing: 1967-12-18
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Granted: 1970-01-27
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Expires: 1987-12-18
Abstract
No abstract record available.
Inventors
- 👤 John D Newkirk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:02
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/11; F02B77/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2741325A
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US2913870A
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US3061039A
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US3021914A
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US3043097A
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US3395775A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |