US2914444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic hemostatic composition
Assignee: Individual
•
Filing: 1950-12-12
•
Granted: 1959-11-24
•
Expires: 1970-12-12
Abstract
No abstract record available.
Inventors
- 👤 David F Smith
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; A61L2400/00; A61L2400/04; Y; Y10; Y10S; Y10S424/00; Y10S424/07
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A STERILE HEMOSTATIC MATERIAL SELECTED FROM THE CLASS CONSISTING OF A PARTIALLY HYDRATED HIGH MOLECULAR WEIGHT CELLULOSE GLYCOLLIC ACID ETHER AND A CELLULOSE SULPHURIC ACID ESTER NON-TOXIC AND NON-IRRITATING IN ANIMAL TISSUE, SAID MATERIAL BEING IN SOLID FORM DRIED TO THE EXTENT THAT IT DOES NOT QUICKLY SHRIVEL OR DISSOLVE IN WATER AT 100* F. BUT INSUFFIENT TO BECOME BRITTLE, SAID MATERIAL HAVING THE PHYSICAL CHARACTERISTICS OF SUBSTANTIAL CAPILLARY POROSITY SO THAT IT IS QUICKLY WET BY, ADSORBS AND COAGULATES THE BLOOD OF MAMMALS, SAID PRODUCT BEING SUBSTANIALLY FREE OF MATERIAL WHICH QUICKLY DISSOLVES IN WATER ON CONTACT AND CONTAINS NO SUBSTANTIAL AMOUNT OF MATERIAL WHICH IS NOT ABSORBED IN THE TISSUES WITHIN A THIRTY-DAY PERIOD.
Claim 2
Dependent Claim
116 words
A STERILE HEMOSTATIC MATERIAL SELECTED FROM THE CLASS CONSISTING OF A PARTIALLY HYDRATED HIGH MOLECULAR WEIGHT CELLULOSE GLYCOLLIC ACID ETHER AND A CELLULOSE SULPHURIC ACID ESTER NON-TOXIC AND NON-IRRITATING IN ANIMAL TISSUE, SAID MATERIAL BEING IN SOLID FORM DRIED TO THE EXTENT THAT IT DOES NOT QUICKLY SHRIVEL OR DISSOLVE IN WATER AT 100* F. BUT INSUFFIENT TO BECOME BRITTLE, SAID MATERIAL HAVING THE PHYSICAL CHARACTERISTICS OF SUBSTANTIAL CAPILLARY POROSITY SO THAT IT IS QUICKLY WET BY, ADSORBS AND COAGULATES THE BLOOD OF MAMMALS, SAID PRODUCT BEING SUBSTANIALLY FREE OF MATERIAL WHICH QUICKLY DISSOLVES IN WATER ON CONTACT AND CONTAINS NO SUBSTANTIAL AMOUNT OF MATERIAL WHICH IS NOT ABSORBED IN THE TISSUES WITHIN A THIRTY-DAY PERIOD.
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |