US3721179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical applicator for grain
Assignee: Driall Driers Inc
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Filing: 1971-08-20
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Granted: 1973-03-20
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Expires: 1991-08-20
Abstract
Abstract DISCLOSED IS AN APPLICATOR FOR APPLYING LIQUID PRESERVATIVES TO GRAIN AS IT IS MOVED BY AN AUGER CONVEYOR FROM A RECEIVING BIN; A SWITCH, RESPONSIVE TO THE GRAIN LEVEL IN THE RECEIVING BIN, ASSURES THAT OPERATION OF THE AUGER CONVEYOR AND FLOW OF THE LIQUID PRESERVATIVES CAN OCCUR ONLY WHEN THE GRAIN LEVEL IN THE RECEIVING BIN IS ABOVE THE INTAKEN END OF THE AUGER CONVEYOR THUS PROVIDED A SEAL PREVENTING DISCHARGE OF THE LIQUID OR ITS FUMES INTO THE ATMOSPHERE.
Inventors
- 👤 R Applegate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
A; A01; A01C; A01C1/00; A01C1/08; A23; A23B; A23B9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |