Patent US3723244A successfully refreshed from Google Patents.
US3723244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous fibrin sheet and method for producing same
Assignee: United States Atomic Energy Commission
•
Filing: 1971-01-18
•
Granted: 1973-03-27
•
Expires: 1991-01-18
Abstract
Abstract Fibrin in sheet form is prepared by centrifuging an aqueous dispersion of monomeric fibrin under fibrin-polymerizing conditions. The centrifugation is conducted in a vessel having a wall for intercepting centrifuged particles and at a speed pelletizing the resulting strands of polymerized fibrin thereon. The pelletized strands interlock to form a fibrous sheet, which is removed from the vessel.
Inventors
- 👤 J Breillatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:34
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/10; D21H13/28; D21H13/34; A; A61; A61L; A61L27/00; A61L27/14; A61L27/22; A61L27/225; D21H5/00; D21H5/12; D21H5/1209; A61F; A61F2310/00; A61F2310/00005; A61F2310/00365; A61F2310/00377; Y; Y10; Y10S; Y10S602/00; Y10S602/90
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
The method of claim 1 wherein said aqueous dispersion comprises whole blood plasma.
Claim 2
Dependent Claim
13 words
The method of claim 1 wherein said aqueous dispersion comprises a blood plasma.
Claim 3
Dependent Claim
39 words
The method of claim 1 wherein said aqueous dispersion is provided in the form of an aqueous solution of purified fibrinogen, a divalent alkaline earth cation, and a small but effective amount of a catalyst for the fibrinogen-to-monomeric-fibrin reaction.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said aqueous dispersion is at a pH in the range of 5.5 to 10.5.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein said centrifuging step is conducted at a temperature in the range of 15* to 55* C.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein said centrifuging step is conducted at a speed generating a pelletizing force of at least 20,000 g.
Claim 7
Dependent Claim
11 words
A sheet of fibrin produced by the process of claim 1.
References Cited (Backward Citations)
US2385802A
Cited
US2533004A
Cited
US2992882A
Cited
US3036341A
Cited
US3014024A
Cited
US3210241A
Cited
US3523807A
Cited
US3617443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |