US2948052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing hollow poppet valves for internal combustion engines
Assignee: Continental Teves AG and Co OHG
•
Filing: 1957-05-27
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Granted: 1960-08-09
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Expires: 1977-05-27
Abstract
No abstract record available.
Inventors
- 👤 Kubera Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:56
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/001; B23P15/002; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49307; Y10T29/49309; Y10T29/4981
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US774242A
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US2177192A
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US2170811A
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US2452628A
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US2452636A
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US2731708A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |