US3862003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating and recovering mucopolysaccharides from connective tissues of animals
Assignee: Siekagaku Kogyo Co Ltd
•
Filing: 1972-10-04
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Granted: 1975-01-21
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Expires: 1992-10-04
Abstract
Abstract A method of extracting mucopolysaccharides from connective tissues of animals, which comprises extracting said connective tissues with water at a temperature of 105* to 150*C under an elevated pressure, subjecting the extract to a protease treatment and/or alkali treatment, and then separating and recovering mucopolysaccharides from the aqueous phase.
Inventors
- 👤 Takashi Okuyama
- 👤 Keiichi Yoshida
- 👤 Katukiyo Sakurai
- 👤 Takashi Ogura
- 👤 Katuyuki Horie
- 👤 Akira Tawada
- 👤 Tadashi Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:56
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0063
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
The method of claim 1 wherein the extracting temperature is 110* to 130*C.
Claim 2
Dependent Claim
17 words
The method of claim 1 wherein said connective tissues are cartilages and skins of mammals and fishes.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein the mucopolysaccharide separated and recovered is a compound selected from the group consisting of chondroitin, chondroitin sulfate, hyaluronic acid, heparin, heparitin sulfate and keratosulfate acid.
References Cited (Backward Citations)
US3451996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |