Patent US2420828A successfully refreshed from Google Patents.
US2420828A
Expired / Lapsed
US
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Stacking machine
Assignee: Individual
•
Filing: 1945-09-17
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Granted: 1947-05-20
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Expires: 1965-09-17
Abstract
No abstract record available.
Inventors
- 👤 Walter J King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:02
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1018260A
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US1518561A
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US1843735A
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US1884356A
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US2059150A
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US2178369A
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US2259558A
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US2324817A
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US2323810A
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US2366378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |