Patent US4983192A successfully refreshed from Google Patents.
US4983192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile sheet filter
Assignee: Individual
•
Filing: 1989-03-03
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Granted: 1991-01-08
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Expires: 2009-03-03
Abstract
Abstract A sheet filter made up of a flat textile article carrying micrometric particles of a resistant and/or adsorptive additive, the textile article made up of fibers which upon heating become temporarily adhesive without fusing. Advantageously the textile article is a nonwoven fibrous fleece or a pile fabric; if a fleece, a second fleece can be placed over the additive particles so heating unites the fleeces as well as adhereing the particles.
Inventors
- 👤 Hubert von Blucher
- 👤 Hasso von Blucher
- 👤 Ernest de Ruiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:34
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28028; B01D; B01D39/00; B01D39/08; B01D39/083; B01J20/28033; B01D2239/00; B01D2239/02; B01D2239/0216; B01D2239/04; B01D2239/0407; B01D2239/06; B01D2239/0604; B01D2239/0618; B01D2239/065; Y; Y10; Y10S; Y10S55/00; Y10S55/44; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23921; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A sheet filter comprising a pile fabric carrying micrometric particles of activated carbon, the base of the pile fabric comprising fusion-resistant fibers and the pile of the fabric comprising fusible fibers, the fusible fibers comprising undrawn amorphous polyester fibers which upon heating to about 80° to 85° C. become temporarily adhesive without fusing, the fabric having been heated under pressure thereby to secure the carbon particles to the pile.
Claim 2
Dependent Claim
69 words
A sheet filter comprising a pile fabric carrying micrometric particles of activated carbon, the base of the pile fabric comprising fusion-resistant fibers and the pile of the fabric comprising fusible fibers, the fusible fibers comprising undrawn amorphous polyester fibers which upon heating to about 80° to 85° C. become temporarily adhesive without fusing, the fabric having been heated under pressure thereby to secure the carbon particles to the pile.
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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) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |