US4983192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Textile sheet filter
Assignee: Individual
•
Filing: 1989-03-03
•
Granted: 1991-01-08
•
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 07:43
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.
References Cited (Backward Citations)
DE88225C
Cited
US1872581A
Cited
GB433186A
Cited
US3015367A
Cited
US3220915A
Cited
US3697347A
Cited
US3998988A
Cited
US3912567A
Cited
US4132650A
Cited
US4160059A
Cited
US4188960A
Cited
US4225642A
Cited
US4285748A
Cited
GB2005016A
Cited
US4201838A
Cited
JPS5548851A
Cited
US4376675A
Cited
US4277266A
Cited
GB2077141A
Cited
US4379802A
Cited
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 |