US2599172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfuric acid esters of hyaluronic acid and processes for the production thereof
Assignee: GD Searle LLC
•
Filing: 1948-11-29
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Granted: 1952-06-03
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Expires: 1968-11-29
Abstract
No abstract record available.
Inventors
- 👤 Hadidian Zareh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0063; C08B37/0072
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
AS A NEW COMPOSITION OF MATTER, A MEMBER OF THE GROUP CONSISTING OF A HYALURONIC ACID SULFATE, WHEREIN THE HYALURONIC ACID IS OBTAINED FROM MAMMALIAN TISSUE, AND COMPOUND CONTAINING 12 TO 16% OF SULFUR, AND SALTS THEREOF.
Claim 2
Dependent Claim
37 words
AS A NEW COMPOSITION OF MATTER, A MEMBER OF THE GROUP CONSISTING OF A HYALURONIC ACID SULFATE, WHEREIN THE HYALURONIC ACID IS OBTAINED FROM MAMMALIAN TISSUE, AND COMPOUND CONTAINING 12 TO 16% OF SULFUR, AND SALTS THEREOF.
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) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |