US3200110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of laminarin sulfates
Assignee: Boots Pure Drug Co Ltd
•
Filing: 1960-12-13
•
Granted: 1965-08-10
•
Expires: 1980-12-13
Abstract
No abstract record available.
Inventors
- 👤 Gollin Ronald Arthur
- 👤 Michaclis Robert
- 👤 Waker Dennis
- 👤 Adams Stewart Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0006; C08B37/0024; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/945
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR THE PREPARATION OF LAMINARIN SULFATE WITH A DEGREE OF POLYMERIZATION BETWEEN 9 AND 20 AND CONTAINING BETWEEN 0.9 AND 2.0 SULPHATE GROUPS PER MONOSACCHARIDE RESIDUE AND THE SODIUM SALT OF WHICH HAS AN ANTILIPAEMIC TO ANTICOAGULANT RATIO OF NOT LESS THAN 5 WHICH COMPRISES SULPHATING LAMINARIN HAVING A MOLECULAR WEIGHT IN THE RANGE OF 1500-3000 DISSOLVED IN A DIALKYL AMIDE OF THE FORMULA RCON(R'')2, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL AND R" IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND ETHYL, WITH SULPHUR TRIOXIDE IN A LIQUID REACTION MIXTURE ESSENTIALLY CONSISTING OF SUCH LAMINARIN, DIALKYL AMIDE AND SULPHUR TRIOXIDE AT A TEMPERTURE BELOW 22*C.
Claim 2
Dependent Claim
114 words
A PROCESS FOR THE PREPARATION OF LAMINARIN SULFATE WITH A DEGREE OF POLYMERIZATION BETWEEN 9 AND 20 AND CONTAINING BETWEEN 0.9 AND 2.0 SULPHATE GROUPS PER MONOSACCHARIDE RESIDUE AND THE SODIUM SALT OF WHICH HAS AN ANTILIPAEMIC TO ANTICOAGULANT RATIO OF NOT LESS THAN 5 WHICH COMPRISES SULPHATING LAMINARIN HAVING A MOLECULAR WEIGHT IN THE RANGE OF 1500-3000 DISSOLVED IN A DIALKYL AMIDE OF THE FORMULA RCON(R'')2, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND METHYL AND R" IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND ETHYL, WITH SULPHUR TRIOXIDE IN A LIQUID REACTION MIXTURE ESSENTIALLY CONSISTING OF SUCH LAMINARIN, DIALKYL AMIDE AND SULPHUR TRIOXIDE AT A TEMPERTURE BELOW 22*C.
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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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |