Patent US2620060A successfully refreshed from Google Patents.
US2620060A
Expired / Lapsed
US
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Drive mechanism for endless bucket lines
Assignee: HELEN M BIRD
•
Filing: 1945-11-20
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Granted: 1952-12-02
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Expires: 1965-11-20
Abstract
No abstract record available.
Inventors
- 👤 Bird Helen Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:44
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E02F3/081; E02F3/12; E02F3/14; E02F3/145
Claims Analysis
Total Claims: 0
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US2402056A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |