Patent US3277634A successfully refreshed from Google Patents.
US3277634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning vent filter for grain bins and the like
Assignee: Day Co
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Filing: 1963-10-09
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Granted: 1966-10-11
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Expires: 1983-10-09
Abstract
No abstract record available.
Inventors
- 👤 Bruce M Wheaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:40
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/74; B01D46/76; B65; B65G; B65G53/00; B65G53/34; B65G53/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
VENT FILTER MEANS FOR BINS FOR STORING PULVERULENT MATERIALS AND THE LIKE, SAID FILTER MEANS COMPRISING: (A) AN UPSTANDING TUBULAR BASE HAVING MEANS AT ITS LOWER END FOR SECURING SAME TO A BIN IN ALIGNMENT WITH A VENT OPENING IN THE UPPER WALL THEREOF, (B) AN INVERTED CUP-LIKE FILTER ELEMENT HAVING A CYLINDRICAL POROUS SIDE WALL, (C) MEANS SECURING THE OPEN LOWER END OF SAID FILTER ELEMENT TO THE UPPER END OF SAID BASE, (D) MEANS CARRIED BY SAID BASE IN INWARDLY SPACED RELATION TO THE CYLINDRICAL SIDE WALL OF SAID FILTER ELEMENT FOR SUPPORTING THE UPPER END WALL OF SAID FILTER ELEMENT WITH THE CYLINDRICAL WALL THEREOF IN A GENERALLY TAUT CONDITION CONCENTRIC WITH SAID BASE, SAID MEANS COMPRISING: (1) UPSTANDING LEG MEANS WITHIN SAID FILTER ELEMENT AND TERMINATING AT ITS UPPER END IN A TUBU-
Claim 2
Dependent Claim
137 words
VENT FILTER MEANS FOR BINS FOR STORING PULVERULENT MATERIALS AND THE LIKE, SAID FILTER MEANS COMPRISING: (A) AN UPSTANDING TUBULAR BASE HAVING MEANS AT ITS LOWER END FOR SECURING SAME TO A BIN IN ALIGNMENT WITH A VENT OPENING IN THE UPPER WALL THEREOF, (B) AN INVERTED CUP-LIKE FILTER ELEMENT HAVING A CYLINDRICAL POROUS SIDE WALL, (C) MEANS SECURING THE OPEN LOWER END OF SAID FILTER ELEMENT TO THE UPPER END OF SAID BASE, (D) MEANS CARRIED BY SAID BASE IN INWARDLY SPACED RELATION TO THE CYLINDRICAL SIDE WALL OF SAID FILTER ELEMENT FOR SUPPORTING THE UPPER END WALL OF SAID FILTER ELEMENT WITH THE CYLINDRICAL WALL THEREOF IN A GENERALLY TAUT CONDITION CONCENTRIC WITH SAID BASE, SAID MEANS COMPRISING: (1) UPSTANDING LEG MEANS WITHIN SAID FILTER ELEMENT AND TERMINATING AT ITS UPPER END IN A TUBU-
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |