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Patent US3294479A successfully refreshed from Google Patents.
US3294479A
Expired / Lapsed
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Clo2 depilation and kerating removal from hides and skins
Assignee: Hoechst AG
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Filing: 1965-02-02
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Granted: 1966-12-27
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Expires: 1985-02-02
Abstract
No abstract record available.
Inventors
- 👤 Rosenbusch Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:08
CPC Classifications
C; C14; C14C; C14C1/00; C14C1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD FOR REMOVING THE KERATIN-CONTAINING PARTS OF ANIMAL HIDES AND PELTS AND THE KERTAIN-CONTAINING PARTS ADHERING TO SUCH HIDES AND PELTS, WHICH COMPRISES CONTACTING SAID HIDES AND PELTS WITH CHLORINE DIOXIDE IN AN AQUEOUS BATH FOR A TIME SUFFICIENT TO LOOSEN SAID KERTAINCONTAINING PARTS, SAID AQUEOUS BATH HAVING A PH UP TO PH 6 AND COMPRISING FROM ABOUT 1 TO 10 PERCENT, BY WEIGHT OF THE HIDES AND PELTS TREATED, OF AN ALKALI METAL CHLORITE, SAID CHLORINE DIOXIDE BEING GENERATED IN SITU IN SAID AQUEOUS BATH FROM SAID ALKALI METAL CHLORITE.
Claim 2
Independent Claim
92 words
A METHOD FOR REMOVING THE KERATIN-CONTAINING PARTS OF ANIMAL HIDES AND PELTS AND THE KERTAIN-CONTAINING PARTS ADHERING TO SUCH HIDES AND PELTS, WHICH COMPRISES CONTACTING SAID HIDES AND PELTS WITH CHLORINE DIOXIDE IN AN AQUEOUS BATH FOR A TIME SUFFICIENT TO LOOSEN SAID KERTAINCONTAINING PARTS, SAID AQUEOUS BATH HAVING A PH UP TO PH 6 AND COMPRISING FROM ABOUT 1 TO 10 PERCENT, BY WEIGHT OF THE HIDES AND PELTS TREATED, OF AN ALKALI METAL CHLORITE, SAID CHLORINE DIOXIDE BEING GENERATED IN SITU IN SAID AQUEOUS BATH FROM SAID ALKALI METAL CHLORITE.
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |