US3303023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of cold-formable austenitic stainless steel for valves for internal-combustion engines
Assignee: Crucible Materials Corp
•
Filing: 1964-08-11
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Granted: 1967-02-07
•
Expires: 1984-08-11
Abstract
No abstract record available.
Inventors
- 👤 Edward J Dulis
- 👤 Kasak August
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:07
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/54; C22C38/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
27 words
IN THE METHOD OF UTILIZING AN INTERNAL-COMBUSTION ENGINE HAVING VALVES THEREIN, THE IMPROVEMENT WHICH COMPRISES USING A VALVE OF AN ALLOY CONSISTING ESSENTIALLY OF, IN WEIGHT PERCENT,
Claim 2
Dependent Claim
27 words
IN THE METHOD OF UTILIZING AN INTERNAL-COMBUSTION ENGINE HAVING VALVES THEREIN, THE IMPROVEMENT WHICH COMPRISES USING A VALVE OF AN ALLOY CONSISTING ESSENTIALLY OF, IN WEIGHT PERCENT,
References Cited (Backward Citations)
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Cited
US2496248A
Cited
US2624671A
Cited
US2784125A
Cited
US3107997A
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US3139337A
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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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |