Patent US3834898A successfully refreshed from Google Patents.
US3834898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat material for internal combustion engines and similar material
Assignee: Honda Motor Co Ltd
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Filing: 1971-09-03
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Granted: 1974-09-10
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Expires: 1991-09-03
Abstract
Abstract A VALVE SEAT MATERIAL FOR AN INTERNAL COMBUSTION ENGINE, WHICH COMPRISES AN IRON BASE ALLOY MATRIX HAVING DISPERSED THEREIN A MEMBER SELECTED FROM THE GROUP CONSISTING OF PB AND A PB COMPOUND AND GLASS.
Inventors
- 👤 K Motoyoshi
- 👤 M Osawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:13
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/22; C; C22; C22C; C22C33/00; C22C33/02; C22C33/0207; C22C33/0228; C22C38/00; C22C38/60; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |