US2447437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft metal casting
Assignee: NL Industries Inc
•
Filing: 1946-03-27
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Granted: 1948-08-17
•
Expires: 1966-03-27
Abstract
No abstract record available.
Inventors
- 👤 Smith Carleton Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:09
CPC Classifications
B; B22; B22D; B22D7/00; B22D7/005; B22D21/00; B22D21/002; B22D21/007; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12188; Y10T428/12194; Y10T428/12229; Y10T428/12236; Y10T428/12243; Y10T428/12264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-17 | 1952-02-16 | 1952-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-17 | 1956-02-16 | 1956-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-17 | 1960-02-16 | 1960-08-17 | $7700.00 | Window Closed / Lapsed |