US5416205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New esters of alginic acid
Assignee: Fidia SpA
•
Filing: 1993-11-22
•
Granted: 1995-05-16
•
Expires: 2013-11-22
Abstract
Abstract Partial esters of alginic acid and salts thereof possess important bioplastic and pharmaceutical qualities and are useful in various fields including medical, surgical, cosmetics and foods.
Inventors
- 👤 Francesco Della Valle
- 👤 Aurelio Romeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:33
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014; A61K47/00; A61K47/30; A61K47/36; A61K47/50; A61K47/51; A61K47/56; A61K47/61; A61K8/00; A61K8/18; A61K8/72; A61K8/73; A61K8/733; A61L; A61L17/00; A61L17/06; A61L17/10; A61L27/00; A61L27/14; A61L27/20; A61Q; A61Q19/00; C; C08; C08B; C08B37/00; C08B37/006; C08B37/0084; Y; Y10; Y10S; Y10S128/00; Y10S128/912; Y10S623/00; Y10S623/924
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
A sanitary or surgical article comprising at least one ester of alginic acid in which 5-95% of the carboxy groups in alginic acid is esterified with an alcohol selected from the group consisting of C 2 -C 12 aliphatic, ar-C 1 -C 4 -aliphatic, C 5 -C 7 -cycloaliphatic and steroidal alcohols or a salt thereof with an inorganic or organic base.
Claim 2
Dependent Claim
62 words
A sanitary or surgical article comprising at least one ester of alginic acid in which 5-95% of the carboxy groups in alginic acid is esterified with an alcohol selected from the group consisting of C 2 -C 12 aliphatic, ar-C 1 -C 4 -aliphatic, C 5 -C 7 -cycloaliphatic and steroidal alcohols or a salt thereof with an inorganic or organic base.
Claim 3
Dependent Claim
32 words
A sanitary or surgical article according to claim 1, wherein said aliphatic alcohol is selected from the group consisting of ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl, amyl, pentyl, hexyl and octyl alcohol.
Claim 4
Dependent Claim
27 words
A sanitary or surgical article according to claim 1, wherein said ar-C 1-4 aliphatic alcohol is selected from the group consisting of benzyl alcohol and phenethyl alcohol.
Claim 5
Dependent Claim
43 words
A sanitary or surgical article according to claim 1, wherein said steroidal alcohol is selected from the group consisting of pregnenolone, pregnanediol, testosterone, 17α-methyltestosterone, 1,2-dihydrotestosterone, 17α-methyl-1,2-dehydrotestosterone, 17α-ethynyltestosterone, 17α-propynyltestosterone, norgestrel, hydroxyprogesterone, 19-nortestosterone, 19-nor-17α-methyltestosterone, 19-nor-17α-ethynyltestosterone, cortisone, hydrocortisone, prednisone, prednisolone, fludrocortisone, dexamethasone, betamethasone, corticosterone and deoxycorticosterone.
Claim 6
Dependent Claim
29 words
A sanitary or surgical article according to claim 1 in which the salt is selected from the group consisting of alkaline metal, alkaline earth metal, magnesium and aluminum salts.
Claim 7
Dependent Claim
28 words
A sanitary or surgical article according to claim 1 in which the salt is selected from the group consisting of aliphatic, araliphatic, cycloaliphatic and heterocyclic amine base salts.
Claim 8
Dependent Claim
19 words
A sanitary or surgical article according to claim 6, in which the amine base is a therapeutically acceptable base.
Claim 9
Dependent Claim
22 words
A sanitary or surgical article according to claim 7 in which the amine base is selected from the group consisting of antibiotics.
Claim 10
Dependent Claim
17 words
A sanitary or surgical article according to claim 1, wherein said article is a film or thread.
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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) | 1998-05-15 | 1998-11-14 | 1999-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-15 | 2002-11-14 | 2003-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-15 | 2006-11-14 | 2007-05-16 | $7700.00 | Window Closed / Lapsed |