Patent US3098731A successfully refreshed from Google Patents.
US3098731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air filtering apparatus
Assignee: American Air Filter Co Inc
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Filing: 1960-12-21
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Granted: 1963-07-23
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Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Earnest J Greene
- 👤 William V Millman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:47
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/18; F; F24; F24F; F24F13/00; F24F13/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN AN AIR CONDITIONING UNIT OF THE TYPE HAVING A CENTRAL SECTION THROUGH WHICH AIR TO BE CONDITIONED IS PASSED, AND OPPOSITELY DISPOSED AND COMPARTMENTS SEPARATED FROM SAID CENTRAL ZONE BY OPPOSITE PARTITIONS: MEANS FORMING AN AIR FILTERING ZONE EXTENDING TRANSVERSELY ACROSS SAID CENTRAL SECTION AND DEFINING A PASSAGE FOR AN AIR FILTERING MEDIUM ADAPTED TO BE ADVANCED THEREINTO THROUGH AN ENTRY APERTURE IN ONE OF SAID PARTITIONS, AND OUT OF AN EXIT APERTURE IN THE OTHER OF SAID PARTITIONS; A SUPPLU OF AIR FILTER MEDIUM OF A LENGTH ADAPTED TO PROVIDE A PLURALITY OF COMPLETE FILTER CHARGES MOUNTED IN SAID END COMPARTMENT ADJACENT SAID ENTRY APERTURE; A ROTABLE MANDREL IS SAID OPPOSITE END COMPARTMENT ADAPTED TO BE ROTATED FOR EFFECTING THE ADVANCE OF FILTER MEDIUM THROUGH SAID PASSAGE AND OUT OF SAID EXIT APERTURE BY WINDING SAID MEDIUM THEREON; MEANS IN SAID OPPOSITE END COMPARTMENT FOR COMPRESSING SAID USED MEDIUM AS IT IS WOUND ON SAID MANDREL INCLUDING ROTATABLE ROLLER MEANS DISPOSED TO DIS-
Claim 2
Dependent Claim
165 words
IN AN AIR CONDITIONING UNIT OF THE TYPE HAVING A CENTRAL SECTION THROUGH WHICH AIR TO BE CONDITIONED IS PASSED, AND OPPOSITELY DISPOSED AND COMPARTMENTS SEPARATED FROM SAID CENTRAL ZONE BY OPPOSITE PARTITIONS: MEANS FORMING AN AIR FILTERING ZONE EXTENDING TRANSVERSELY ACROSS SAID CENTRAL SECTION AND DEFINING A PASSAGE FOR AN AIR FILTERING MEDIUM ADAPTED TO BE ADVANCED THEREINTO THROUGH AN ENTRY APERTURE IN ONE OF SAID PARTITIONS, AND OUT OF AN EXIT APERTURE IN THE OTHER OF SAID PARTITIONS; A SUPPLU OF AIR FILTER MEDIUM OF A LENGTH ADAPTED TO PROVIDE A PLURALITY OF COMPLETE FILTER CHARGES MOUNTED IN SAID END COMPARTMENT ADJACENT SAID ENTRY APERTURE; A ROTABLE MANDREL IS SAID OPPOSITE END COMPARTMENT ADAPTED TO BE ROTATED FOR EFFECTING THE ADVANCE OF FILTER MEDIUM THROUGH SAID PASSAGE AND OUT OF SAID EXIT APERTURE BY WINDING SAID MEDIUM THEREON; MEANS IN SAID OPPOSITE END COMPARTMENT FOR COMPRESSING SAID USED MEDIUM AS IT IS WOUND ON SAID MANDREL INCLUDING ROTATABLE ROLLER MEANS DISPOSED TO DIS-
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) | 1966-07-22 | 1967-01-21 | 1967-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-22 | 1971-01-21 | 1971-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-22 | 1975-01-21 | 1975-07-23 | $7700.00 | Window Closed / Lapsed |