US3237805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for dispensing particulate material
Assignee: Halliburton Co
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Filing: 1964-10-28
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Granted: 1966-03-01
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Expires: 1984-10-28
Abstract
No abstract record available.
Inventors
- 👤 Joel M Stogner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:13
CPC Classifications
G; G01; G01F; G01F13/00; G01F13/001
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
AN APPARATUS FOR DISPENSING MATERIAL AT AN ACCURATELY CONTROLLED RATE, SAID APPARATUS COMPRISING: MATERIAL CONTAINING MEANS INCLUDING DOWNWARDLY CONVERGING, FRUSTO-CONICAL WALL MEANS AND AN UPWARDLY FACING, CONTINUOUSLY OPEN, MATERIAL INLET; GENERALLAY HORIZONTAL, PERMEABLE SURFACE MEANS EXTENDING ACROSS AN INTERIOR PORTION OF SAID MATERIAL CONTAINING MEANS; VERTICAL PASSAGE MEANS DISPOSED COAXIALLY OF SAID FRUSTOCONICAL WALL MEANS, EXTENDING THROUGH SAID SURFACE MEANS, AND ADAPTED TO PROVIDE AN OUTLET FOR PARTICULATE MATERIAL CONTAINED WITHIN SAID CONTAINING MEANS ABOVE SAID SURFACE MEANS; MEANS FOR FLOWING GAS UPWARDLY AND ENTIRELY ENCIRCLING SAID PASSAGE MEANS THROUGH AT LEAST A PORTION OF SAID MEANS FOR SELECTIVELY VARYING THE RATE OF FLOW OF PARTICULATE MATERIAL THROUGH SAID VERTICAL PASSAGE MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |