Patent US4162934A successfully refreshed from Google Patents.
US4162934A
Expired / Lapsed
US
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Method of producing sorption bodies
Assignee: Carl Munters AB
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Filing: 1977-10-25
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Granted: 1979-07-31
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Expires: 1997-10-25
Abstract
Abstract A method of producing a sorption body is disclosed in which a plurality of sheets of asbestos paper are formed from a fiber pulp having molecular sieves placed therein. The sheets are arranged in contact with one another at spaced points to form transectional channels therebetween for the media which are to pass through the body, with the sheets supporting each other. The assembled sheets are subjected to an increase in temperature sufficient to drive off the organic binding agents present in the paper and to break down the asbestos fiber to a powdery consistency.
Inventors
- 👤 Per Norback
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:03
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28028; B01D; B01D53/00; B01D53/02; B01J20/28033; B01J20/28042; D; D21; D21H; D21H25/00; D21H25/04; D21H25/06; F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; D21H13/00; D21H13/36; D21H13/38; D21H13/42; D21H17/00; D21H17/63; D21H17/67; D21H17/70; F24F2203/00; F24F2203/10; F24F2203/1032; F24F2203/1036; F24F2203/104; F24F2203/1048
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
172 words
The method of producing a sorption body comprising the steps of forming sheets of asbestos paper from asbestos fibre pulp having molecular sieves placed therein; arranging the sheets in contact with each other at spaced points to form transectional channels therebetween for the media which are to pass through the body with the sheets supporting each other; subjecting the sheets to an increase in temperature sufficient to drive off the organic binding agents present in the paper and to break down the asbestos fibre into an amorphous product; said step of subjecting the sheet to an increase in temperature comprising the steps of subjecting the sheets first to a temperature of between 400° C. and 500° C. to burn off the organic constituents of the asbestos sheets and then heating the sheets to a temperature of between 700° C. and 800° C. to convert the asbestos fibres to a powdery consistency; and thereafter applying a further stiffening coating of at least one, preferably inorganic, constituent by precipitating the coating onto the sheets.
Claim 2
Independent Claim
172 words
The method of producing a sorption body comprising the steps of forming sheets of asbestos paper from asbestos fibre pulp having molecular sieves placed therein; arranging the sheets in contact with each other at spaced points to form transectional channels therebetween for the media which are to pass through the body with the sheets supporting each other; subjecting the sheets to an increase in temperature sufficient to drive off the organic binding agents present in the paper and to break down the asbestos fibre into an amorphous product; said step of subjecting the sheet to an increase in temperature comprising the steps of subjecting the sheets first to a temperature of between 400° C. and 500° C. to burn off the organic constituents of the asbestos sheets and then heating the sheets to a temperature of between 700° C. and 800° C. to convert the asbestos fibres to a powdery consistency; and thereafter applying a further stiffening coating of at least one, preferably inorganic, constituent by precipitating the coating onto the sheets.
Claim 3
Dependent Claim
39 words
The method of claim 1, including the step of mixing said molecular sieves into the fibre pulp of which the asbestos paper is produced in such quantities that it reaches at least 25% by weight of the completed paper.
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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) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |