US2696479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding materials for the preparation of foundry cores and molds
Assignee: Bayer AG
•
Filing: 1951-05-01
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Granted: 1954-12-07
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Expires: 1971-05-01
Abstract
No abstract record available.
Inventors
- 👤 Ossenbruggen Walter
- 👤 Konrad Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:42
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB303858A
Cited
US1962495A
Cited
US1959179A
Cited
US2031538A
Cited
US2156457A
Cited
US2322667A
Cited
GB575734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |