Patent US2827373A successfully refreshed from Google Patents.
US2827373A
Expired / Lapsed
US
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Ni-cr-co-mo valve seat insert
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1954-10-07
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Granted: 1958-03-18
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Expires: 1974-10-07
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Prasse
- 👤 Adna A Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:14
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
VALVE SEAT INSERT FOR INTERNAL COMBUSTION ENGINES COMPRISING A RING CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOSITION: PERCENT CARBON 2.25 TO 2.75 NICKEL 35 TO 40 CHROMIUM 32 TO 38 COBALT 10 TO 14 MOLYBDENUM 6 TO 8 IRON 8.0 MAXIMUM
Claim 2
Dependent Claim
40 words
VALVE SEAT INSERT FOR INTERNAL COMBUSTION ENGINES COMPRISING A RING CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOSITION: PERCENT CARBON 2.25 TO 2.75 NICKEL 35 TO 40 CHROMIUM 32 TO 38 COBALT 10 TO 14 MOLYBDENUM 6 TO 8 IRON 8.0 MAXIMUM
References Cited (Backward Citations)
US2481976A
Cited
US2742356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |