US2660769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die casting
Assignee: Dow Chemical Co
•
Filing: 1950-12-18
•
Granted: 1953-12-01
•
Expires: 1970-12-18
Abstract
No abstract record available.
Inventors
- 👤 Foster C Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:07
CPC Classifications
B; B22; B22D; B22D17/00; B22D17/02; B22D17/04; B22D17/20; B22D17/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1923214A
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Cited
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Cited
US2459892A
Cited
US2597269A
Cited
US2509079A
Cited
US2520348A
Cited
US2485526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |