Patent US4639898A successfully refreshed from Google Patents.
Patent US3814588A successfully refreshed from Google Patents.
US3814588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making organic fertilizer
Assignee: Bedminster Bioconversion Corp
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Filing: 1972-05-10
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Granted: 1974-06-04
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Expires: 1992-05-10
Abstract
Abstract A DEVICE FOR PROTECTING AIR PASSAGES AND VALVES IS PROVIDED FOR USE IN ROTARY DIGESTERS FOR THE AEROBIC BECOMPOSITION OF WASTE ORGANIC MATERIAL. ONE TYPE OF SUCH DIGESTER IS DIVIDED INTO A SERIES OF COMPARTMENTS BY ARTITIONS. PASSAGES FOR THE FLOW OF AIR AND GENERATED GASESARE PROVIDED IN THE PARTITIONS AND VALVE CONTROLLED PASSAGES ARE PROVIDED TO VENT THE COMPARTMENT TO THE OUTSIDE. THESE PASSAGES ARE PROTECTED BY A COVER STRUCTURE WHICH INCLUDES A HINGED BAFFLE WHICH IS CLOSED WHEN THE PASSAGES ARE BURRIED IN THE MATERIAL DURING ROTATION OF THE DIGESTER AND WHICH WHEN THE PASSAGES EMERGE FROM THE MATERIAL.
Inventors
- 👤 A Eweson
- 👤 E Eweson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:40
CPC Classifications
A; A01; A01C; A01C3/00; A01C3/02; A01C3/023; C; C05; C05F; C05F17/00; C05F17/90; C05F17/921; C05F17/929; C05F17/964; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y02P20/145; Y02W; Y02W30/00; Y02W30/40
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |