US4801619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hyaluronic acid preparation to be used for treating inflammations of skeletal joints
Assignee: Pfizer Health AB
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Filing: 1986-04-02
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Granted: 1989-01-31
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Expires: 2006-04-02
Abstract
Abstract Hyaluronic acid preparation containing an effective amount of hyaluronic acid of a molecular weight exceeding 3×10 6 dalton, for intra-articular administration in the treatment of steroid arthropathy and progressive cartilage degeneration caused by proteoglycan degradation.
Inventors
- 👤 Gert T. Lindblad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:30
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K31/715; A61K31/726; A61K31/728
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
42 words
A method for the treatment of a joint undergoing progressive cartilage degeneration caused by proteoglycan degradation, comprising administering intra-articularly to the said joint a hyaluronic acid preparation containing an effective amount of hyaluronic acid of a molecular weight exceeding 4×10 6 dalton.
Claim 2
Independent Claim
42 words
A method for the treatment of a joint undergoing progressive cartilage degeneration caused by proteoglycan degradation, comprising administering intra-articularly to the said joint a hyaluronic acid preparation containing an effective amount of hyaluronic acid of a molecular weight exceeding 4×10 6 dalton.
Claim 3
Independent Claim
36 words
A method for preventing steroid arthropathy of a human joint, comprising administering intra-articularly to the said joint a hyaluronic acid preparation containing an effective amount of hyaluronic acid of a molecular weight exceeding 4×10 6 dalton.
Claim 4
Independent Claim
36 words
A method for preventing steroid arthropathy of a human joint, comprising administering intra-articularly to the said joint a hyaluronic acid preparation containing an effective amount of hyaluronic acid of a molecular weight exceeding 4×10 6 dalton.
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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) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |