US2417531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card sorting machine
Assignee: MCBEE Co
•
Filing: 1944-07-07
•
Granted: 1947-03-18
•
Expires: 1964-07-07
Abstract
No abstract record available.
Inventors
- 👤 Nelson S Welk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:54
CPC Classifications
G; G06; G06K; G06K21/00; G06K21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1704259A
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US1358389A
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US1702994A
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US1748692A
Cited
US2259463A
Cited
US2261719A
Cited
US2338133A
Cited
US2284808A
Cited
US2315860A
Cited
US2389343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-03-17 | 1950-09-16 | 1951-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-03-17 | 1954-09-16 | 1955-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-03-17 | 1958-09-16 | 1959-03-18 | $7700.00 | Window Closed / Lapsed |