US3620134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material transport system
Assignee: Nester and Faust Manufacturing Corp
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Filing: 1968-09-30
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Granted: 1971-11-16
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Expires: 1988-09-30
Abstract
Abstract THIS INVENTION PROVIDES A POSITIVE DISPLACEMENT APPARATUS THAT ALLOWS ONE TO REPEAT AUTOMATICALLY IN A PRECISE MANNER THE ELUTING OR TRANSPORTING OF MATERIAL FROM A RESERVOIR, SUCH AS A COLUMN, TO A SECOND COLUMN OR A SECOND RESERVOIR. A MOTOR IS DRIVEN, UNDER CONTROLLED SPEED, TO DRIVE A PISTON INTO THE FIRST RESERVOIR AT A PRECISE RATE. AS THE PISTON ENTERS THE RESERVOIR, MATERIAL THEREIN, SUCH AS A LIQUID, IS FORCED UPWARDLY THROUGH AN APERTURE IN THE PISTON WHICH CO-ACTS WITH A TUBULAR ELEMENT CONNECTED TO THE SECOND RESERVOIR. PREFERABLY, THE BOTTOM OF THE PISTON IS CONCAVE AND THE PASSAGEWAY THROUGH THE PISTON HEAD BEGINS AT THE APEX OF THE CONCAVITY.
Inventors
- 👤 Ralph D Conlon
- 👤 William M Fleisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:29
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/34; F; F04; F04B; F04B1/00; F04B1/02; F04B13/00; F04B13/02; F04B49/00; F04B49/06; F04B9/00; F04B9/02; G01N1/00; G01N1/28; G01N1/38
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |