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US2987170A
Expired / Lapsed
US
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Screw-type conveyor
Assignee: AUTO EXPRESS RAIL Inc
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Filing: 1958-10-03
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Granted: 1961-06-06
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Expires: 1978-10-03
Abstract
No abstract record available.
Inventors
- 👤 Rollie D Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:35
CPC Classifications
B; B65; B65G; B65G33/00; B65G33/02; B65G33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1320292A
Cited
US1131558A
Cited
US1741981A
Cited
US1750310A
Cited
US1984659A
Cited
US2487693A
Cited
US2620917A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |