US3738913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing polypeptides
Assignee: INOLEX CHEMICAL Co
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Filing: 1970-09-11
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Granted: 1973-06-12
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Expires: 1990-09-11
Abstract
Abstract THE METHOD OF PRODUCING THE POLYPEPTIDES OF THIS INVENTION DEALS WITH PROTEIN HYDROLYSIS WHEREIN A COLLAGENCONTAINING MATERIAL IS SUBJECTED TO HEAT IN THE PRESENCE OF AQUEOUS SOLUTION HAVINGG SULFITE IONS PRESENT, TO PRODUCE A HYDROLYZED PROTEIN SOLUTION OF REDUCED GEL-FORMING CHARACTER HAVING A FORMOL NITROGEN VALUE OF THE ORDER OF 6 OR LESS, SUBJECTING THE HYDROLYZED PROTEIN SOLUTION TO ANION EXCHANGE TREATMENT AND THEREAFTER FURTHER HYDROLYZING THE PROTEINS USING PROTTEOLYTIC ENZYMES TO PRODUCE A POLYPEPTIDE PRODUCT HAVING A FORMOL NITROGEN VALUE IN THE RANGE OF 8 TO 17, WHICH POLYPEPTIDES ARE USEFUL FOR TREATING OF HAIR DUE TO UNIQUE SORPTION CHARACTERISTICS.
Inventors
- 👤 V Johnsen
- 👤 R Burnett
- 👤 E Matern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:32
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61K8/65; A61Q; A61Q5/00; A61Q5/12; A61Q5/02; Y; Y10; Y10S; Y10S424/00; Y10S424/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |