US2478461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for treating foundry sand
Assignee: Nichols Engineering and Research Corp
•
Filing: 1946-03-16
•
Granted: 1949-08-09
•
Expires: 1966-03-16
Abstract
No abstract record available.
Inventors
- 👤 George E Connolly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:12
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/08; Y; Y10; Y10S; Y10S241/00; Y10S241/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US238044A
Cited
US1058313A
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GB172221A
Cited
US1935344A
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US2012694A
Cited
US2226330A
Cited
US2326218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-08 | 1953-02-07 | 1953-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-08 | 1957-02-07 | 1957-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-08 | 1961-02-07 | 1961-08-09 | $7700.00 | Window Closed / Lapsed |