US2822235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of leather-fatting
Assignee: Boehme Fettchemie GmbH
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Filing: 1954-11-09
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Granted: 1958-02-04
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Expires: 1974-11-09
Abstract
No abstract record available.
Inventors
- 👤 Heyden Rudi
- 👤 Dieckelmann Gerhard
- 👤 Plapper Jurgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:50
CPC Classifications
C; C14; C14C; C14C9/00; C14C9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
THE METHOD OF RETARDING DISCOLORATION OF LEATHER ON EXPOSURE TO LIGHT WHICH COMPRISES FATTING SAID LEATHER BY APPLYING TO SAID LEATHER AN AQUEOUS EMULSION OF AN EMULSIFIER AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF EPOXIDIZED DERIVATIVES OF HIGH-MOLECULAR UNSATURATED FATTY ACIDS AND HIGH-MOLECULAR UNSATURATED FATTY ALCOHOL ESTERS OF MONOBASIC AND POLYBASIC ACIDS.
Claim 2
Independent Claim
54 words
THE METHOD OF RETARDING DISCOLORATION OF LEATHER ON EXPOSURE TO LIGHT WHICH COMPRISES FATTING SAID LEATHER BY APPLYING TO SAID LEATHER AN AQUEOUS EMULSION OF AN EMULSIFIER AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF EPOXIDIZED DERIVATIVES OF HIGH-MOLECULAR UNSATURATED FATTY ACIDS AND HIGH-MOLECULAR UNSATURATED FATTY ALCOHOL ESTERS OF MONOBASIC AND POLYBASIC ACIDS.
References Cited (Backward Citations)
US2569502A
Cited
US2567237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |