US2839355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sterilization of surgical dressings
Assignee: Johnson and Johnson
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Filing: 1956-05-08
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Granted: 1958-06-17
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Expires: 1976-05-08
Abstract
No abstract record available.
Inventors
- 👤 William L George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:35
CPC Classifications
A; A61; A61L; A61L2/00; A61L2/16; A61L2/20; A61L2/204; A61L2103/00; A61L2103/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN THE METHOD OF STERILIZING A FIBROUS SURGICAL DRESSING BY TREATMENT WITH VAPORS OF WATER AND FORMALDEHYDE IN A WRAPPING WHICH IS BACTERIA-IMPERMEABLE BUT PERMEABLE TO SAID VAPORS, WHICH DRESSING IS SUSCEPTIBLE TO UNDESIRABLE LOSS OF LOFT UPON PROLONGED WETTING WITH AN AQUEOUS LIQUID THE IMPROVEMENT WHICH COMPRISES PROVIDING IN SAID DRESSING AQUEOUS FORMALDEHYDE LIQUID IN AN AMOUNT AND CONCENTRATION TO PROVIDE FORMALDEHYDE IN AN AMOUNT IN THE RANGE OF 0.4 TO 1.5% BASED ON THE WEIGHT OF THE DRESSING PLUS THE WRAPPING, AND WATER IN AN AMOUNT IN THE RANGE OF 3 TO 10% BASED ON THE WEIGHT OF THE DRESSING, WRAPPING THE SAID DRESSING WITHIN 1 SECTO 3 MIN. AND MAINTAINING AT A TEMPERATURE IN THE RANGE OF 50 TO 200*F. AT A MOISTURE CONTENT WITHIN THE SAID RANGE OF 3 TO 10% FOR A TIME IN THE RANGE OF ONE HOUR TO 3 WEEKS, WHEREBY THERE IS OBTAINED A NON-DETERIORATED FIBROUS SURGICAL DRESSING WHICH IS STERILE AND INDIVIDUALLY WRAPPED IN BACTERIA-IMPERMEABLE MATERIAL.
Claim 2
Dependent Claim
165 words
IN THE METHOD OF STERILIZING A FIBROUS SURGICAL DRESSING BY TREATMENT WITH VAPORS OF WATER AND FORMALDEHYDE IN A WRAPPING WHICH IS BACTERIA-IMPERMEABLE BUT PERMEABLE TO SAID VAPORS, WHICH DRESSING IS SUSCEPTIBLE TO UNDESIRABLE LOSS OF LOFT UPON PROLONGED WETTING WITH AN AQUEOUS LIQUID THE IMPROVEMENT WHICH COMPRISES PROVIDING IN SAID DRESSING AQUEOUS FORMALDEHYDE LIQUID IN AN AMOUNT AND CONCENTRATION TO PROVIDE FORMALDEHYDE IN AN AMOUNT IN THE RANGE OF 0.4 TO 1.5% BASED ON THE WEIGHT OF THE DRESSING PLUS THE WRAPPING, AND WATER IN AN AMOUNT IN THE RANGE OF 3 TO 10% BASED ON THE WEIGHT OF THE DRESSING, WRAPPING THE SAID DRESSING WITHIN 1 SECTO 3 MIN. AND MAINTAINING AT A TEMPERATURE IN THE RANGE OF 50 TO 200*F. AT A MOISTURE CONTENT WITHIN THE SAID RANGE OF 3 TO 10% FOR A TIME IN THE RANGE OF ONE HOUR TO 3 WEEKS, WHEREBY THERE IS OBTAINED A NON-DETERIORATED FIBROUS SURGICAL DRESSING WHICH IS STERILE AND INDIVIDUALLY WRAPPED IN BACTERIA-IMPERMEABLE MATERIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |