US2660031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust manifold for internalcombustion engines
Assignee: American Locomotive Co
•
Filing: 1951-01-03
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Granted: 1953-11-24
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Expires: 1971-01-03
Abstract
No abstract record available.
Inventors
- 👤 Frederic C Tromel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:47
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/14; F01N13/08; F01N13/10; F02; F02B; F02B37/00; F02B37/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190724104A
Cited
US917081A
Cited
US1808165A
Cited
US2110395A
Cited
US2295907A
Cited
US2423602A
Cited
US2388924A
Cited
US2479318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |