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Patent US3364663A successfully refreshed from Google Patents.
US3364663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner bag
Assignee: White Consolidated Industries Inc
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Filing: 1965-06-28
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Granted: 1968-01-23
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Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Robert C Lagerstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:11
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A VACUUM CLEANER HAVING MOTOR OPERATED SUCTION MEANS FOR DRAWING IN DIRT-LADEN AIR AND DISCHARGING THE SAME THROUGH A FILTERING MEANS DURING OPERATION OF THE MOTOR AND FOR TERMINATING THE FLOW OF AIR WHEN THE MOTOR IS SHUT OFF, THE IMPROVEMENT COMPRISING THE COMBINATION OF AN INNER FILTER BAG HAVING WALLS OF POROUS PAPER FOR FILTERING DIRT-LADEN AIR PASSAGE FROM THE INTERIOR TO THE EXTERIOR THEREOF, AND AN OUTER CONTAINER OF RESILIENTLY STRETCHABLE AND AIR PERMEABLE MATERIAL SURROUNDING SAID FILTER BAG, SAID FILTER BAG BEING INFLATABLE TO A PREDETERMINED SIZE IN RESPONSE TO PASSAGE OF AIR THERETHROUGH AND SAID OUTER CONTAINER WHEN IN UNSTRETCHED CONDITION BEING SMALLER THAN SAID PREDETERMINED SIZE BUT BEING RESILIENTLY EXPANDABLE IN RESPONSE TO INFLATION OF SAID FILTER BAG, WHEREBY WHEN AIR FLOW THROUGH SAID
Claim 2
Dependent Claim
130 words
IN A VACUUM CLEANER HAVING MOTOR OPERATED SUCTION MEANS FOR DRAWING IN DIRT-LADEN AIR AND DISCHARGING THE SAME THROUGH A FILTERING MEANS DURING OPERATION OF THE MOTOR AND FOR TERMINATING THE FLOW OF AIR WHEN THE MOTOR IS SHUT OFF, THE IMPROVEMENT COMPRISING THE COMBINATION OF AN INNER FILTER BAG HAVING WALLS OF POROUS PAPER FOR FILTERING DIRT-LADEN AIR PASSAGE FROM THE INTERIOR TO THE EXTERIOR THEREOF, AND AN OUTER CONTAINER OF RESILIENTLY STRETCHABLE AND AIR PERMEABLE MATERIAL SURROUNDING SAID FILTER BAG, SAID FILTER BAG BEING INFLATABLE TO A PREDETERMINED SIZE IN RESPONSE TO PASSAGE OF AIR THERETHROUGH AND SAID OUTER CONTAINER WHEN IN UNSTRETCHED CONDITION BEING SMALLER THAN SAID PREDETERMINED SIZE BUT BEING RESILIENTLY EXPANDABLE IN RESPONSE TO INFLATION OF SAID FILTER BAG, WHEREBY WHEN AIR FLOW THROUGH SAID
References Cited (Backward Citations)
US428853A
Cited
US798680A
Cited
US1828584A
Cited
US2312999A
Cited
US2514280A
Cited
US2593328A
Cited
US2779433A
Cited
US2951553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |