US2864160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of continuously protecting pyrophoric flint material manufactured by extrusion
Assignee: Evonik Operations GmbH
•
Filing: 1954-10-11
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Granted: 1958-12-16
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Bungardt Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:06
CPC Classifications
B; B21; B21C; B21C23/00; B21C23/22; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12771
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2123416A
Cited
DE329746C
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US1948242A
Cited
US2062486A
Cited
US2290734A
Cited
US2334609A
Cited
US2528406A
Cited
US2660301A
Cited
US2762707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |