US2811464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of artificial leather having suede-like character
Assignee: Evonik Operations GmbH
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Filing: 1955-12-12
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Granted: 1957-10-29
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Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 Stiehl Karl
- 👤 Reus Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/04; D06N3/06; D06N3/007; D06N3/0075; Y; Y10; Y10S; Y10S428/00; Y10S428/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS OF PRODUCING SUEDE-LIKE ARTIFICIAL LEATHER WHICH COMPRISES APPLYING A THIN COATING OF A PIGMENTED PLASTICIZER CONTAINING POLYVINYL CHLORIDE PASTE OVER A PLIABLE GELLED POLYVINYL CHLORIDE COATING ON A BASE, DUSTING A THIN COATING OF A POWDERED BLOWING AGENT WHICH GASIFIES AT A TEMPERATURE BETWEEN 100 AND 200*C. ON THE POLYVINYL CHLORIDE PASTE COATING, AND HEATING THE POLYVINYL CHLORIDE PASTE COATING CARRYING THE DUSTED ON BLOWING AGENT TO A TEMPERATURE AT WHICH THE POLYVINYL CHLORIDE PASTE GELS AND THE BLOWING AGENT GASIFIES.
Claim 2
Dependent Claim
83 words
A PROCESS OF PRODUCING SUEDE-LIKE ARTIFICIAL LEATHER WHICH COMPRISES APPLYING A THIN COATING OF A PIGMENTED PLASTICIZER CONTAINING POLYVINYL CHLORIDE PASTE OVER A PLIABLE GELLED POLYVINYL CHLORIDE COATING ON A BASE, DUSTING A THIN COATING OF A POWDERED BLOWING AGENT WHICH GASIFIES AT A TEMPERATURE BETWEEN 100 AND 200*C. ON THE POLYVINYL CHLORIDE PASTE COATING, AND HEATING THE POLYVINYL CHLORIDE PASTE COATING CARRYING THE DUSTED ON BLOWING AGENT TO A TEMPERATURE AT WHICH THE POLYVINYL CHLORIDE PASTE GELS AND THE BLOWING AGENT GASIFIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |