US2556486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sand treating apparatus
Assignee: C O Bartlett & Snow Co
•
Filing: 1949-01-03
•
Granted: 1951-06-12
•
Expires: 1969-01-03
Abstract
No abstract record available.
Inventors
- 👤 Benjamin A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:03
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; B22C5/0409; B22C5/0454
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1718004A
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US660278A
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US1445935A
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US1374445A
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US1526596A
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US1806077A
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US2217231A
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US2314486A
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US2433738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |