US4479799A
Expired / Lapsed
US
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Hypodermic syringe containing microfibers of an amorphous heparin salt
Assignee: Riker Laboratories Inc
•
Filing: 1983-04-06
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Granted: 1984-10-30
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Expires: 2003-04-06
Abstract
Abstract Microfibrous heparin salts, nonwoven webs of such fibers, a process for preparing the fibers and the use of the webs for the rapid heparinization of blood are disclosed.
Inventors
- 👤 Charles G. Thiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:01
CPC Classifications
D; D01; D01F; D01F9/00; C; C08; C08L; C08L5/00; C08L5/10; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
26 words
A hypodermic syringe containing a quantized amount of microfibers of an amorphous heparin salt which have an average length to diameter ratio of at least 20.
Claim 2
Dependent Claim
26 words
A hypodermic syringe containing a quantized amount of microfibers of an amorphous heparin salt which have an average length to diameter ratio of at least 20.
Claim 3
Dependent Claim
28 words
A hypodermic syringe according to claim 1 wherein the microfibers have a density of about 1.8 g/cc and an average length to diameter ratio of at least 80.
Claim 4
Dependent Claim
29 words
A hypodermic syringe according to claim 1 wherein the cation of the amorphous heparin salt is selected from groups I and II of the periodic table of the elements.
Claim 5
Dependent Claim
17 words
A hypodermic syringe according to claim 1 wherein the cation of the amorphous heparin salt is sodium.
Claim 6
Dependent Claim
17 words
A hypodermic syringe according to claim 1 wherein the cation of the amorphous heparin salt is calcium.
Claim 7
Dependent Claim
17 words
A hypodermic syringe according to claim 1 wherein the cation of the amorphous heparin salt is magnesium.
Claim 8
Dependent Claim
17 words
A hypodermic syringe according to claim 1 wherein the cation of the amorphous heparin salt is zinc.
Claim 9
Dependent Claim
17 words
A hypodermic syringe according to claim 1 wherein the cation of the amorphous heparin salt is potassium.
Claim 10
Dependent Claim
17 words
A hypodermic syringe according to claim 1 wherein the cation of the amorphous heparin salt is lithium.
References Cited (Backward Citations)
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US4168377A
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |