Patent US4289387A successfully refreshed from Google Patents.
US3136240A
Expired / Lapsed
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Cross-flow aeration system for grain bins
Assignee: Individual
•
Filing: 1960-11-28
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Granted: 1964-06-09
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Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Rabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:51
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/74; B65D88/742
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
IN APPARATUS FOR AERATING GRAIN STORED IN BINS OF GREATER HEIGHT THAN DIAMETER, WHICH COMPRISES, AN AIR FLOW DUCT ARRANGED VERTICALLY ALONG ONE SIDE OF A BIN HAVING PERFORATE PORTIONS AT DIFFERENT LEVELS IN SAID BIN AND SECTIONS OF PREDETERMINED LENGTH AND OF PROGRESSIVELY DECREASED DIAMETER TOWARD THE BOTTOM OF SAID BIN, A DISCHARGE DUCT ARRANGED VERTICALLY IN SAID BIN OPPOSITE SAID AIR FLOW DUCT AND HAVING SPACED PERFORATE PORTIONS IN ITS LOWER SECTIONS WHEREBY AIR FLOWS THEREINTO DIRECTLY ACROSS FROM SAID AIR FLOW DUCT, A SMALLER DUCT WITHIN SAID DISCHARGE DUCT, AND A FAN ADAPTED TO FORCE AIR THROUGH SAID AIR FLOW DUCT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |