Patent US3380246A successfully refreshed from Google Patents.
US3380246A
Expired / Lapsed
US
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Exhaust manifold system for internal combustion engines
Assignee: General Electric Co
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Filing: 1966-01-03
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Granted: 1968-04-30
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Millard F Dowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:46
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1811; F01N13/08; F01N13/10; F02; F02B; F02B37/00; F02B37/02; F01N2260/00; F01N2260/10; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319100A
Cited
US2113077A
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US2321943A
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US3051147A
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US3043094A
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US3221492A
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US3177649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-30 | 1971-10-30 | 1972-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-30 | 1975-10-30 | 1976-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-30 | 1979-10-30 | 1980-04-30 | $7700.00 | Window Closed / Lapsed |