Patent US2847767A successfully refreshed from Google Patents.
US2847767A
Expired / Lapsed
US
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Spiral conveyors
Assignee: Individual
•
Filing: 1952-04-29
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Granted: 1958-08-19
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Expires: 1972-04-29
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert M Carrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:25
CPC Classifications
B; B65; B65G; B65G27/00; B65G2812/00; B65G2812/03; B65G2812/0384; B65G2812/0388; B65G2812/0392; Y; Y10; Y10S; Y10S198/00; Y10S198/952
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1078917A
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US1043158A
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US2094785A
Cited
DE695938C
Cited
US2374664A
Cited
US2464216A
Cited
US2658609A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |