Patent US2650813A successfully refreshed from Google Patents.
US2650813A
Expired / Lapsed
US
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Disintegrating and gathering chain structure
Assignee: Joy Manufacturing Co
•
Filing: 1949-08-06
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Granted: 1953-09-01
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Expires: 1969-08-06
Abstract
No abstract record available.
Inventors
- 👤 Lester G Rollins
- 👤 Barrett Arthur Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:08
CPC Classifications
E; E21; E21C; E21C27/00; E21C27/20; E21C27/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1244785A
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US1469132A
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US1588563A
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US1468868A
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GB337281A
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US2125296A
Cited
US2107942A
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US2046024A
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US2189669A
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US2398675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |