US3076749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of unhairing skins and hides
Assignee: Roehm GmbH Darmstadt
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Filing: 1960-06-20
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Granted: 1963-02-05
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Expires: 1980-06-20
Abstract
No abstract record available.
Inventors
- 👤 Grimm Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
C; C14; C14C; C14C1/00; C14C1/06; C14C1/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF UNHAIRING HALIDES WHICH CONSISTS ESSENTIALLY OF SOFTENING WATER-SOAKED HIDES BY CONTACTING THEM AS AN AMOUNT OF A POWDERED PROTELYTIC ENZYME INSUFFICIENT TO CAUSE SUBSTANTIAL LOOSENING OF HAIR, AND THEN CONTACTING THE SOFTENED HIDES, AT A PH BETWEEN ABOUT 5.5 AND 8, WITH AT LEAST ONE REAGENT SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF SULFUR CONTAINING REDUCING AGENTS AND INORGANIC NEUTRAL SALTS OF THE ALKALI METALS AND AMMONIUM.
Claim 2
Independent Claim
70 words
THE METHOD OF UNHAIRING HALIDES WHICH CONSISTS ESSENTIALLY OF SOFTENING WATER-SOAKED HIDES BY CONTACTING THEM AS AN AMOUNT OF A POWDERED PROTELYTIC ENZYME INSUFFICIENT TO CAUSE SUBSTANTIAL LOOSENING OF HAIR, AND THEN CONTACTING THE SOFTENED HIDES, AT A PH BETWEEN ABOUT 5.5 AND 8, WITH AT LEAST ONE REAGENT SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF SULFUR CONTAINING REDUCING AGENTS AND INORGANIC NEUTRAL SALTS OF THE ALKALI METALS AND AMMONIUM.
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |