US2461280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of lead
Assignee: St. Joseph's Hospital and Medical Center
•
Filing: 1944-05-25
•
Granted: 1949-02-08
•
Expires: 1964-05-25
Abstract
No abstract record available.
Inventors
- 👤 William T Isbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
C; C22; C22B; C22B13/00; C22B13/06; C22B13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1208237A
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US1233652A
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US1513307A
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US1728942A
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US1821643A
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US2206117A
Cited
US2239370A
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US2267698A
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US2271023A
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US2312811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |