US3637657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum complex of sulfated polysaccharide and process for the preparation thereof
Assignee: Meito Sangyo KK
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Filing: 1969-03-28
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Granted: 1972-01-25
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Expires: 1989-03-28
Abstract
Abstract ALUMINUM COMPLEX OF SULFATED POLYSACCHARIDE WHICH EXHIBITS AN ANTI-PEPTIC ULCER ACTIVITY WHEN ORALLY ADMINISTERED, AND WHICH IS A COMPLEX OF WATER-SOLUBLE SALTS OF SULFATED POLYSACCHARIDE AND BASIC ALUMINUM SALTS OF THE FORMULA A12+N(OH)3NXY (WHEREIN X STANDS FOR AN ANION, N IS A POSITIVE NUMBER GREATER THAN ZERO, AND Y IS A POSITIVE NUMBER EQUALLING 6/VALENCY OF X), WHICH HAVE AN INTRINSIC VISCOSITY (N) OF 0.02-1.30 AS MEASURED IN 1 N AQUEOUS CAUSTIC SODA SOLUTION AT 25* C., A SULFUR CONTENT OF 10$1-20% BY WEIGHT, AND AN ALUMINUM CONTENT OF 2-12% BY WEIGHT; AND A PROCESS FOR THE PREPARATION THEREOF.
Inventors
- 👤 Eiji Morii
- 👤 Tadasuke Numasawa
- 👤 Kouichi Iwata
- 👤 Shoichi Yamagata
- 👤 Akira Ishimori
- 👤 Hiromi Hanai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:03
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/02; C08B31/06; C08B31/063; C08B37/00; C08B5/00; C08B5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |