Patent US4670658A successfully refreshed from Google Patents.
US4670658A
Expired / Lapsed
US
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Protective sheet
Assignee: EZ Em Inc
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Filing: 1985-07-02
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Granted: 1987-06-02
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Expires: 2005-07-02
Abstract
Abstract A multi-ply sheet having a center ply support matrix in which the radio opaque compound barium sulfate is distributed as a powder and is supported by the matrix. The barium sulfate is present in an amount sufficient to block scatter radiation produced by the medical radiology procedures. A base ply of a thin liquid impervious polyethylene material is fastened to one side of the support matrix ply. A third ply is composed of a typical absorptive surgical drape material and is fastened to the other side of the support matrix ply.
Inventors
- 👤 Phillip H. Meyers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:06
CPC Classifications
G; G21; G21F; G21F1/00; G21F1/12; G21F3/00; G21F3/02; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T442/00; Y10T442/20; Y10T442/259
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
40 words
A protective sheet useful for radiological procedures, comprising: a support matrix and a radio-opaque portion of barium sulfate supported by said matrix, said radio-opaque portion being present in an amount sufficient to block a substantial amount of the scatter radiation.
Claim 2
Dependent Claim
40 words
A protective sheet useful for radiological procedures, comprising: a support matrix and a radio-opaque portion of barium sulfate supported by said matrix, said radio-opaque portion being present in an amount sufficient to block a substantial amount of the scatter radiation.
Claim 3
Dependent Claim
36 words
The sheet of claim 1 wherein said support portion is gauze and wherein said barium sulfate is supported in said gauze by soaking said gauze in a barium sulfate suspension and then evaporating the water therefrom.
Claim 4
Dependent Claim
42 words
The sheet of claim 1 further comprising: a base and a cover, said base being attached to and positioned on one side of said support matrix and said cover being attached to and positioned on the other side of said support matrix.
Claim 5
Dependent Claim
42 words
The sheet of claim 2 further comprising: a base and a cover, said base being attached to and positioned on one side of said support matrix and said cover being attached to and positioned on the other side of said support matrix.
Claim 6
Dependent Claim
13 words
The sheet of claim 3 wherein said base is a thin impermeable ply.
Claim 7
Dependent Claim
13 words
The sheet of claim 4 wherein said base is a thin impermeable ply.
Claim 8
Dependent Claim
12 words
The sheet of claim 3 wherein said cover is a surgical drape.
Claim 9
Dependent Claim
12 words
The sheet of claim 4 wherein said cover is a surgical drape.
Claim 10
Dependent Claim
26 words
The sheet of claim 1 wherein between 350 to 730 grams of barium sulfate powder is evenly distributed in each square foot of said support matrix.
Claim 11
Dependent Claim
26 words
The sheet of claim 3 wherein between 350 to 730 grams of barium sulfate powder is evenly distributed in each square foot of said support matrix.
Claim 12
Dependent Claim
16 words
The sheet of claim 3 wherein said sheet is at least two square feet in area.
Claim 13
Dependent Claim
15 words
The sheet of claim 3 wherein said sheet is between one-half to one inch thick.
Claim 14
Dependent Claim
80 words
A protective laminate for reducing exposure to scatter radiation generated during radiological procedures, the laminate comprising: a thin impermeable base ply, a radio-opaque ply attached to and positioned on said base ply, said radio-opaque ply including a support matrix and a radio-opaque compound supported by said matrix, said radio-opaque compound being present in an amount sufficient to block a substantial amount of the scatter radiation, and an upper ply of absorbent material attached to and positioned on said radio-opaque ply.
Claim 15
Dependent Claim
80 words
A protective laminate for reducing exposure to scatter radiation generated during radiological procedures, the laminate comprising: a thin impermeable base ply, a radio-opaque ply attached to and positioned on said base ply, said radio-opaque ply including a support matrix and a radio-opaque compound supported by said matrix, said radio-opaque compound being present in an amount sufficient to block a substantial amount of the scatter radiation, and an upper ply of absorbent material attached to and positioned on said radio-opaque ply.
Claim 16
Dependent Claim
15 words
The laminate of claim 13 wherein said radio-opaque ply is impregnated with barium sulfate powder.
Claim 17
Dependent Claim
26 words
The laminate of claim 14 wherein between 350 to 730 grams of said barium sulfate powder is distributed in each square foot of said support matrix.
References Cited (Backward Citations)
US4041872A
Cited
US4286170A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |