US2517772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Neutralized oxidized cellulose products
Assignee: Parke Davis and Co LLC
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Filing: 1945-05-11
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Granted: 1950-08-08
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Expires: 1965-05-11
Abstract
No abstract record available.
Inventors
- 👤 Doub Leonard
- 👤 Walter H Seegers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:28
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61L15/42; A61L15/44; A61L2300/00; A61L2300/20; A61L2300/252; A61L2300/254; A61L2300/40; A61L2300/418; A61L2400/00; A61L2400/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A SURGICAL DRESSING COMPRISING AN AGGREGATE OF INDIVIDUAL FIBERS OF CELLULOSE IMPREGNATED WITH THROMBIN, SAID CELLULOSE BEING PARTICALLY OXIDIZED BY GASEOUS NO3 TO THE EXTENT THAT IT IS ABSORBABLE IN BODY FLUIDS AND BEING NEUTRALIZED TO THE EXTENT THAT SAID CELLULOSE PLACED IN ABOUT 100 TIMES ITS WEIGHT OF WATER GIVES AN AQUEOUS MIXTURE HAVING A PH BETWEEN 5.5 AND 7.5.
Claim 2
Dependent Claim
61 words
A SURGICAL DRESSING COMPRISING AN AGGREGATE OF INDIVIDUAL FIBERS OF CELLULOSE IMPREGNATED WITH THROMBIN, SAID CELLULOSE BEING PARTICALLY OXIDIZED BY GASEOUS NO3 TO THE EXTENT THAT IT IS ABSORBABLE IN BODY FLUIDS AND BEING NEUTRALIZED TO THE EXTENT THAT SAID CELLULOSE PLACED IN ABOUT 100 TIMES ITS WEIGHT OF WATER GIVES AN AQUEOUS MIXTURE HAVING A PH BETWEEN 5.5 AND 7.5.
References Cited (Backward Citations)
US2232990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |