US4185626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material detectably by X-rays
Assignee: Johnson and Johnson
•
Filing: 1977-12-20
•
Granted: 1980-01-29
•
Expires: 1997-12-20
Abstract
Abstract X-ray detectable filament of elastomeric material for incorporation in a surgical dressing, including an X-ray opaque substance in sufficient proportions to render the filament detectable by X-rays, the filament incorporating throughout its length a continuous, preferably internal, reinforcing thread such as a textile yarn.
Inventors
- 👤 Graham Jones
- 👤 Geoffrey Unwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/448; A; A61; A61F; A61F13/00; A61F13/15; A61F13/44; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F1/106; A61B; A61B90/00; A61B90/39; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
An X-ray detectable surgical dressing having incorporated therein a filament of elastomeric material containing from 40 to 90 percent by weight, based on the weight of the elastomer, of an X-ray opaque filler material comprising a non-toxic element of atomic weight above 100, said filament incorporating throughout its length a continuous reinforcing thread.
Claim 2
Dependent Claim
53 words
An X-ray detectable surgical dressing having incorporated therein a filament of elastomeric material containing from 40 to 90 percent by weight, based on the weight of the elastomer, of an X-ray opaque filler material comprising a non-toxic element of atomic weight above 100, said filament incorporating throughout its length a continuous reinforcing thread.
Claim 3
Dependent Claim
16 words
X-ray detectable dressing according to claim 1, wherein the reinforcing thread is internal to said filament.
Claim 4
Dependent Claim
14 words
X-ray detectable dressing according to claim 2, wherein the elastomeric material is polyvinyl chloride.
Claim 5
Dependent Claim
18 words
X-ray detectable dressing according to claim 3, wherein the reinforcing thread is a substantially central continuous textile yarn.
Claim 6
Dependent Claim
16 words
X-ray detectable dressing according to claim 4, wherein the X-ray opaque substance is powdered barium sulphate.
Claim 7
Dependent Claim
31 words
X-ray detectable dressing according to claim 5, wherein the thickness of the filament is such as to provide an X-ray opaque transverse path through the filament, of at least 28 mils.
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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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |