Patent US2972385A successfully refreshed from Google Patents.
US2972385A
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Folding implement frame
Assignee: Allis Chalmers Corp
•
Filing: 1958-10-22
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Granted: 1961-02-21
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Expires: 1978-10-22
Abstract
No abstract record available.
Inventors
- 👤 Maynard E Walberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:27
CPC Classifications
A; A01; A01B; A01B73/00; A01B73/02; A01B73/04; A01B73/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US236531A
Cited
US1348813A
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US662605A
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US1072863A
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US1267762A
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US1404544A
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GB629817A
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US2306127A
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US2327834A
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US2583053A
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GB663792A
Cited
US2864121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |