Patent US3370941A successfully refreshed from Google Patents.
US3370941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten-containing alloy cast iron useful for internal combustion engine parts
Assignee: Johnson Products Inc
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Filing: 1966-09-22
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Granted: 1968-02-27
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Expires: 1986-09-22
Abstract
No abstract record available.
Inventors
- 👤 Kenneth E Kueny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:15
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/06; C22C37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
AN INTERNAL COMBUSTION ENGINE VALVE TRAIN COMPONENT COMPRISING A BODY HAVING AT LEAST A BEARING SURFACE CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOSITION: ELEMENT: PERCENT BY WEIGHT CARBON 3.00-3.55 SILICON 2.00-2.90 MANGANESE 0.70-1.10 NICKEL 0.15-0.70 CHROMIUM 0.40-1.25 MOLYBDENUM 0.15-0.70 TUNGSTEN 0.50-10.00 IRON (PLUS MINOR SULFUR AND PHOSPHOROUS IMPURITIES) BALANCE
Claim 2
Dependent Claim
48 words
AN INTERNAL COMBUSTION ENGINE VALVE TRAIN COMPONENT COMPRISING A BODY HAVING AT LEAST A BEARING SURFACE CONSISTING ESSENTIALLY OF THE FOLLOWING COMPOSITION: ELEMENT: PERCENT BY WEIGHT CARBON 3.00-3.55 SILICON 2.00-2.90 MANGANESE 0.70-1.10 NICKEL 0.15-0.70 CHROMIUM 0.40-1.25 MOLYBDENUM 0.15-0.70 TUNGSTEN 0.50-10.00 IRON (PLUS MINOR SULFUR AND PHOSPHOROUS IMPURITIES) BALANCE
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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) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |