US3751329A
Expired / Lapsed
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Poromeric materials
Assignee: IT RESINE SpA SOC
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Filing: 1971-06-30
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Granted: 1973-08-07
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Expires: 1991-06-30
Abstract
Abstract POROMERIC MATERIALS, PARTICULARLY LEATHER SUBSTITUTES, HAVE A NON-WOVEN BACKING AND A MICROPOROUS POLYURETHANE FILM FACING, THE INTERMEDIATE LAYER BEING A FOAM COAGULATED FROM A DISPERSION CONTAINING MORE THAN 45% RESIN BY WEIGHT AND AIR IN A VOLUMETRIC RATIO DISPERSION TO AIR OF 1:2 TO 2:1.
Inventors
- 👤 G Fonzi
- 👤 T Paleologo
- 👤 G Toso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:28
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; B; B32; B32B; B32B5/00; B32B5/02; B32B5/022; B32B27/00; B32B27/06; B32B27/065; B32B27/40; B32B5/18; B32B5/20; B32B5/22; B32B5/24; B32B5/245; C08J9/30; D; D06; D06N; D06N3/00; D06N3/0086; D06N3/04; D06N3/042; D06N3/10; D06N3/12; D06N3/14; D06N3/145; D06N3/18; D06N3/183; B32B2266/00; B32B2266/02; B32B2266/0207; B32B2305/00; B32B2305/02; B32B2305/026; B32B2309/00; B32B2309/02; B32B2375/00; B32B2437/00; B32B2437/02; C08J2201/00; C08J2201/04; C08J2201/05; C08J2201/0504; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T442/00; Y10T442/60; Y10T442/647
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |