US3560141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aldehyde,alum and dihydroxybenzoic acid tanned collagen articles production
Assignee: Ethicon Inc
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Filing: 1968-08-02
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Granted: 1971-02-02
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Expires: 1988-08-02
Abstract
Abstract THE INVENTION INVOLVES TANNING A COLLAGEN TAPE MADE OF FILAMENT SPUN FROM HIDES DISINTEGRATED BY SWELLING BY TANNING THE TAPE WITH AN ALDEHYDE, A RESORCYCLIC ACID, AND AN ALUMINUM SALT. FORMALDEHYDE, ACETALDEHYDE, GLYOXAL, SUCCINALDEHYDE AND MALONIC ALDEHYDE ARE ENUMERATED AS THE ALDEHYDE WHILE ALUM, BASIC ALUMINUM ACETATE, AND ALUMINO FORMO-ACETATE ARE THE ALUMINUM SALTS USED. IN ONE EXAMPLE, THE TAPE IS TANNED IN A SOLUTION OF 1 TO 2% RESORCYCLIC ACID, .05% EDTA, AND 1% NAHSO3 OR FORMALDEHYDE SULFOZYLATE. THE TAPE IS DRIED, AND THEN RETANNED IN A BATH OF .5 TO 2.5% ALUMINO FORMO-ACETATE AND .05 TO 4% FORMALDEHYDE AT PH 2 TO 4.7. THE TAPE IS DRIED AND FALSE TWISTED.
Inventors
- 👤 John Kurilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:16
CPC Classifications
C; C14; C14C; C14C9/00; A; A61; A61L; A61L17/00; A61L17/06; A61L17/08; D; D01; D01F; D01F4/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |