US4027393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of in vivo sterilization of surgical implantables
Assignee: MDT Corp
•
Filing: 1975-09-19
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Granted: 1977-06-07
•
Expires: 1995-09-19
Abstract
Abstract Surgical and dental apparatus may be sterilized after implantation in the patient and caused to provide bactericidal effects in the tissue proximate to the apparatus. The apparatus contains silver or is silver coated. A positive current is applied to the apparatus which releases atomic silver into the volume surrounding the apparatus.
Inventors
- 👤 Franklin H. Ellis
- 👤 Stephen W. Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:29
CPC Classifications
A; A61; A61B; A61B90/00; A61C; A61C5/00; A61C5/40; A61B90/08; A61B2090/0813
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
55 words
A method to sterilize exposed root canals of teeth during endodontic procedures, comprising of the steps of: inserting a silver post into the root canal to the tip of said root canal; and applying positive current to said post at a level of approximately one-half to two microamperes for a time sufficient to affect sterilization.
Claim 2
Independent Claim
55 words
A method to sterilize exposed root canals of teeth during endodontic procedures, comprising of the steps of: inserting a silver post into the root canal to the tip of said root canal; and applying positive current to said post at a level of approximately one-half to two microamperes for a time sufficient to affect sterilization.
Claim 3
Dependent Claim
13 words
A method according to claim 1 wherein said time is approximately one-half hour.
References Cited (Backward Citations)
US2121875A
Cited
US2276623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |