Patent US2774680A successfully refreshed from Google Patents.
US2774680A
Expired / Lapsed
US
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Process for making aerosol filters
Assignee: Individual
•
Filing: 1954-07-06
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Granted: 1956-12-18
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Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Edward J Hackney
- 👤 Charles D Faucette
- 👤 Frederick R Darkis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204; A24D3/0212; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/18; B01J; B01J39/00; B01J39/08; B01J39/14; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE PROCESS OF MAKING AN AEROSOL FILTER WHICH INCLUDES MOVING A FLAT BAND CONSISTING OF GENERALLY PARALLEL FILAMENTS OF TEXTILE MATERIAL, ALL OF SAID FILAMENTS BEARING A SIMILAR ELECTRICAL CHARGE TENDING TO SEPARATE THE FILAMENTS AND A MAJORITY THEREOF BEING WITHIN THE FIELD OF AT LEAST A NEIGHBORING FILAMENT, INTO AND THROUGH AN ATMOSPHERIC SUSPENSION OF ROD-LIKE FIBERS OF DIAMETER NOT EXCEEDING ABOUT 40 MICRONS OR THE DIAMETER OF THE FILA-
Claim 2
Dependent Claim
71 words
THE PROCESS OF MAKING AN AEROSOL FILTER WHICH INCLUDES MOVING A FLAT BAND CONSISTING OF GENERALLY PARALLEL FILAMENTS OF TEXTILE MATERIAL, ALL OF SAID FILAMENTS BEARING A SIMILAR ELECTRICAL CHARGE TENDING TO SEPARATE THE FILAMENTS AND A MAJORITY THEREOF BEING WITHIN THE FIELD OF AT LEAST A NEIGHBORING FILAMENT, INTO AND THROUGH AN ATMOSPHERIC SUSPENSION OF ROD-LIKE FIBERS OF DIAMETER NOT EXCEEDING ABOUT 40 MICRONS OR THE DIAMETER OF THE FILA-
References Cited (Backward Citations)
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US2053123A
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US2372437A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |