US2512181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1945-11-19
•
Granted: 1950-06-20
•
Expires: 1965-11-19
Abstract
No abstract record available.
Inventors
- 👤 Spears Charleszine Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:24
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/46; G01J3/52; G01J3/526; G01J3/528; G01J3/522
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1351661A
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US1329896A
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US1515512A
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US1629330A
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US1636991A
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US1832750A
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US1718919A
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US1964260A
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US1960669A
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US2221774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |