Patent US3429440A successfully refreshed from Google Patents.
US3429440A
Expired / Lapsed
US
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Conveyor transfer device
Assignee: University of California Berkeley
•
Filing: 1966-07-27
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Granted: 1969-02-25
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Expires: 1986-07-27
Abstract
No abstract record available.
Inventors
- 👤 Fredrick L Hill
- 👤 Lauren W Gates
- 👤 William C Friedel Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:38
CPC Classifications
A; A01; A01D; A01D45/00; A01D45/006; B; B65; B65G; B65G47/00; B65G47/52; B65G47/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US339972A
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US427660A
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US1491211A
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FR580175A
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US1895268A
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US1975687A
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US2287447A
Cited
GB560867A
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GB688441A
Cited
US2707554A
Cited
FR1056648A
Cited
US2924838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |