Patent US3092479A successfully refreshed from Google Patents.
US3092479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double bag filter
Assignee: Individual
•
Filing: 1960-06-01
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Granted: 1963-06-04
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Expires: 1980-06-01
Abstract
No abstract record available.
Inventors
- 👤 Carl W Hedberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:15
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/56; B01D46/58; B01D46/60; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D2265/00; B01D2265/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A GAS FILTERING APPARATUS COMPRISING A HOUSING HAVING A DIRTY GAS INLET AND A CLEAN GAS OUTLET, A PLURALITY OF DOUBLE WALLED FILTERS DISPOSED WITHIN SAID HOUSING BETWEEN SAID DIRTY GAS INLET AND SAID CLEAN GAS OUTLET, EACH OF SAID FILTERS HAVING AN INNER AND AN OUTER BAG, MEANS FOR SUSPENDING SAID BAGS WITHIN SAID HOUSING A PLURALITY OF ELONGATE SPRING ELEMENTS FOR MAINTAINING A SPACED RELATION BETWEEN THE INNER AND OUTER, BAGS OF SAID FILTERS, AND AN ANNULAR MEMBER OF GENERALLY U-SHAPED CROSS-SECTIONAL CONFIGURATION ATTACHED TO THE BOTTOM OF EACH OF SAID FILTERS, THE UPPER TERMINAL PORTION OF SAID SPRING ELEMEMENTS BEING ATTACHED TO SAID MEANS FOR SUSPENDING SAID BAGS WITHIN
Claim 2
Dependent Claim
112 words
A GAS FILTERING APPARATUS COMPRISING A HOUSING HAVING A DIRTY GAS INLET AND A CLEAN GAS OUTLET, A PLURALITY OF DOUBLE WALLED FILTERS DISPOSED WITHIN SAID HOUSING BETWEEN SAID DIRTY GAS INLET AND SAID CLEAN GAS OUTLET, EACH OF SAID FILTERS HAVING AN INNER AND AN OUTER BAG, MEANS FOR SUSPENDING SAID BAGS WITHIN SAID HOUSING A PLURALITY OF ELONGATE SPRING ELEMENTS FOR MAINTAINING A SPACED RELATION BETWEEN THE INNER AND OUTER, BAGS OF SAID FILTERS, AND AN ANNULAR MEMBER OF GENERALLY U-SHAPED CROSS-SECTIONAL CONFIGURATION ATTACHED TO THE BOTTOM OF EACH OF SAID FILTERS, THE UPPER TERMINAL PORTION OF SAID SPRING ELEMEMENTS BEING ATTACHED TO SAID MEANS FOR SUSPENDING SAID BAGS WITHIN
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |