Patent US3758087A successfully refreshed from Google Patents.
US3758087A
Expired / Lapsed
US
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Contact device
Assignee: Envirotech Corp
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Filing: 1971-04-20
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Granted: 1973-09-11
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Expires: 1991-04-20
Abstract
Abstract A filter device in the form of a perforated, hollow spherical contact article for use in an apparatus for intercontacting fluid streams is described and illustrated. Preferably, the article comprises a pair of similarly shaped polymeric hemispheres, each of which has a plurality of spaced, radially extending portions adjacent the mating edge. In this preferred form, the hemispheres are joined together at these radially extending portions so as to provide a pair of hemispheres joined at spaced intervals to form a sphere.
Inventors
- 👤 H Hoon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:38
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/30; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30207; B01J2219/304; B01J2219/30416; Y; Y10; Y10S; Y10S261/00; Y10S261/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A generally spherical contact article for use as packing in an apparatus for cleaning a contaminated gaseous stream by countercurrently contacting the gaseous stream with a liquid stream, said article comprising: a. A pair of similarly sized hollow hemispheres, the walls of which are perforated; b. Each of said hemispheres including spaced-apart tab portions which extend inwardly from the equatorial edge of the hemisphere substantially coplanar with that equatorial edge, said tab portions being arranged on one of said hemispheres of said pair in a pattern which is symmetric with the arrangement of tabs on the other said hemisphere; c. Said pairs of said hemispheres being joined to form a sphere with associated pairs of said tabs juxtaposed within the general peripheral confines of the article; d. Each of said hemispheres further including recesses which are formed into the walls thereof and which are associated with each of said tabs, said recesses extending generally perpendicular to the plane of the tabs.
Claim 2
Dependent Claim
161 words
A generally spherical contact article for use as packing in an apparatus for cleaning a contaminated gaseous stream by countercurrently contacting the gaseous stream with a liquid stream, said article comprising: a. A pair of similarly sized hollow hemispheres, the walls of which are perforated; b. Each of said hemispheres including spaced-apart tab portions which extend inwardly from the equatorial edge of the hemisphere substantially coplanar with that equatorial edge, said tab portions being arranged on one of said hemispheres of said pair in a pattern which is symmetric with the arrangement of tabs on the other said hemisphere; c. Said pairs of said hemispheres being joined to form a sphere with associated pairs of said tabs juxtaposed within the general peripheral confines of the article; d. Each of said hemispheres further including recesses which are formed into the walls thereof and which are associated with each of said tabs, said recesses extending generally perpendicular to the plane of the tabs.
References Cited (Backward Citations)
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Cited
US2198861A
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US2597704A
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US2925678A
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US3364656A
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US3543937A
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |