US3291558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of leather
Assignee: Evonik Operations GmbH
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Filing: 1962-08-27
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Granted: 1966-12-13
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Expires: 1982-08-27
Abstract
No abstract record available.
Inventors
- 👤 Bader Erich
- 👤 Kottenhahn Karl-Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:28
CPC Classifications
C; C14; C14C; C14C9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A PROCESS FOR THE INCORPORATION OF POLYMERIC MATERIAL IN LEATHER BY WORKING AQUEOUS DISPERSIONS OF POLYMERIZABLE ORGANIC SUBSTANCES INTO THE LEATHER AND POLYMERIZING SUCH POLYMERIZABLE SUBSTANCES WITHIN THE LEATHER WITH THE AID OF A POLYMERIZATION CATALYST, THE STEPS OF WORKING AN AQUEOUS DISPERSION CONTAINING AT LEAST ONE LIQUID POLYMERIZABLE ORGANIC MONOMER CONTAINING A TERMINAL >C=CH2 GROUP AND AT LEAST ONE HIGH MOLECULAR WEIGHT POLYMER OF A MONOMER CONTAINING A TERMINAL >C=CH2 GROUP, THE MONOMER-POLYMER CONTENT OF THE AQUEOUS DISPERSION BEING 5 TO 60% BY WEIGHT AND THE MONOMER CONTENT IN THE MONOMER-POLYMER MIXTURE BEING 50-95% BY WEIGHT AND THE POLYMER CONTENT THEREOF BEING 5-50% BY WEIGHT, AN EMULSIFIER COMPONENT AND AT LEAST ONE POLYMERIZATION PROMOTER DISSOLVED IN THE MONOMER INTO THE LEATHER AND POLYMERIZING THE MONOMER IN THE THUS TREATED LEATHER.
Claim 2
Dependent Claim
132 words
IN A PROCESS FOR THE INCORPORATION OF POLYMERIC MATERIAL IN LEATHER BY WORKING AQUEOUS DISPERSIONS OF POLYMERIZABLE ORGANIC SUBSTANCES INTO THE LEATHER AND POLYMERIZING SUCH POLYMERIZABLE SUBSTANCES WITHIN THE LEATHER WITH THE AID OF A POLYMERIZATION CATALYST, THE STEPS OF WORKING AN AQUEOUS DISPERSION CONTAINING AT LEAST ONE LIQUID POLYMERIZABLE ORGANIC MONOMER CONTAINING A TERMINAL >C=CH2 GROUP AND AT LEAST ONE HIGH MOLECULAR WEIGHT POLYMER OF A MONOMER CONTAINING A TERMINAL >C=CH2 GROUP, THE MONOMER-POLYMER CONTENT OF THE AQUEOUS DISPERSION BEING 5 TO 60% BY WEIGHT AND THE MONOMER CONTENT IN THE MONOMER-POLYMER MIXTURE BEING 50-95% BY WEIGHT AND THE POLYMER CONTENT THEREOF BEING 5-50% BY WEIGHT, AN EMULSIFIER COMPONENT AND AT LEAST ONE POLYMERIZATION PROMOTER DISSOLVED IN THE MONOMER INTO THE LEATHER AND POLYMERIZING THE MONOMER IN THE THUS TREATED LEATHER.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |