US2543808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing fibrinogen
Assignee: Parke Davis and Co LLC
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Filing: 1946-12-26
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Granted: 1951-03-06
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Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 Walter H Seegers
- 👤 Eugene C Loomis
- 👤 Arnold G Ware
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:56
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/745; C07K14/75; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
PROCESS FOR OBTAINING A HIGHLY PURIFED FIBRINOGEN PRODUCT WHICH COMPRISES MELTING FROZEN PLASMA WHILE MAINTAINING THE RESIDUAL FIBRINOGEN AT ABOUT 3* C., COLLECTING AND WASHING SAID RESIDUAL FIBRINOGEN WITH THREE TO SIX PORTIONS OF DILUTE SALINE AT ABOUT 0* C., COLLECTING AND WASHING PORTIONS OF DILUTE SALINE BEING MORE THAN ABOUT ONE-FOURTH BUT LESS THAN ABOUT ONE-HALF THE VOLUME OF THE RESIDUAL FIBRINOGEN, DISSOLVING THE WASHED FIBRINOGEN IN A MINUMAL QUANTITY OF DILUTE SALINE AT A TEMPERATURE BETWEEN 15 AND 40* C. AND SEPARATING THE UNDISSOLVED MATERIAL FROM THE RESULTING SOLUTION.
Claim 2
Dependent Claim
91 words
PROCESS FOR OBTAINING A HIGHLY PURIFED FIBRINOGEN PRODUCT WHICH COMPRISES MELTING FROZEN PLASMA WHILE MAINTAINING THE RESIDUAL FIBRINOGEN AT ABOUT 3* C., COLLECTING AND WASHING SAID RESIDUAL FIBRINOGEN WITH THREE TO SIX PORTIONS OF DILUTE SALINE AT ABOUT 0* C., COLLECTING AND WASHING PORTIONS OF DILUTE SALINE BEING MORE THAN ABOUT ONE-FOURTH BUT LESS THAN ABOUT ONE-HALF THE VOLUME OF THE RESIDUAL FIBRINOGEN, DISSOLVING THE WASHED FIBRINOGEN IN A MINUMAL QUANTITY OF DILUTE SALINE AT A TEMPERATURE BETWEEN 15 AND 40* C. AND SEPARATING THE UNDISSOLVED MATERIAL FROM THE RESULTING SOLUTION.
References Cited (Backward Citations)
US2176004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |