Patent US2640579A successfully refreshed from Google Patents.
US2640579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conveyer
Assignee: —
•
Filing: —
•
Granted: 1953-06-02
•
Expires: 1970-06-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:14
CPC Classifications
B; B65; B65G; B65G15/00; B65G15/22; B65G15/24; B65G2201/00; B65G2201/02; Y; Y10; Y10S; Y10S425/00; Y10S425/118
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1452711A
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Cited
US2207782A
Cited
US2139877A
Cited
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US2339952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |