US3554038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling device for rotary cone vacuum dryer
Assignee: Pennwalt Corp
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Filing: 1968-12-16
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Granted: 1971-01-12
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Expires: 1988-12-16
Abstract
Abstract A SAMPLING DEVICE FOR REMOVAL OF PRODUCT TEST SPECIMENS FROM A ROTATING VACUUM DRYER IN WHICH A SPIRAL CHANNEL AXIALLY EXTENDS THROUGH ONE OF THE HOLLOW TRUNNIONS HELD IN THE USUAL ROTARY GLAND SYSTEM. ROTATION OF THE SCREW CHANNEL EXTRACTS A PORTION OF THE PRODUCT MATERIAL AND DEPOSITS IT IN A VALVE WITHOUT INTERRUPTING ROTATION OF THE DRYER OR BREAKING THE VACUUM THERETO OR DISCONTINUING ANY PHASE OF THE CYCLE OF OPERATIONS.
Inventors
- 👤 Daniel Patrick Sweeney
- 👤 Werner Carl Haas
- 👤 Harold R Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:39
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |