Patent US3902484A successfully refreshed from Google Patents.
US3902484A
Expired / Lapsed
US
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Disposable surgical drape
Assignee: Kimberly Clark Corp
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Filing: 1974-04-05
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Granted: 1975-09-02
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Expires: 1994-04-05
Abstract
Abstract An improved disposable surgical drape comprising a fibrous base sheet, a fluid impervious plastic layer covering at least a portion of the base sheet, the improvement comprising a sheet of flexible, normally hydrophobic, open celled foam material bonded to the outer surface of the plastic layer, the foam material being treated with the reaction product of a mineral acid and a fatty acid tertiary amine wherein the amine is partially neutralized to a fatty acid tertiary ammonium salt which renders the foam material antistatic, while providing increased rates of fluid absorption and reduced tendency for lathering when the foam material is rubbed with water present on the foam material.
Inventors
- 👤 Terry L Winters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:56
CPC Classifications
A; A61; A61B; A61B46/00; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/19; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512; Y10T428/24752
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
98 words
IN A DISPOSABLE SURGICAL DRAPE HAVING A PRIMARY OPERATIVE AREA, SAID DRAPE COMPRISING A FIBROUS BASE SHEET, A FLUID IMPERVIOUS PLASTIC LAYER CONVERING SAID PRIMARY OPERATIVE AREA, THE IMPROVEMENT COMPRISING A SHEET OF FLEXIBLE, NORMALLY HYDROPHOBIC, OPEN CELLED FOAM MATERIAL BONDED TO THE OUTER SURFACE OF SAID PLASTIC LAYER, SAID FOAM MATERIAL HAVING BEEN TREATED WITH THE REACTION PRODUCT OF A MINERAL ACID AND A FATTY ACID TERTIARY AMINE, SAID FATTY ACID TERITARY AMINE BEING NEUTRALIZED LESS THAN ABOUT 34 PERCENT TO FORM A FATTY ACID TERTIARY AMMONIUM SALT, SAID FATTY ACID TERTIARY AMINE HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
98 words
IN A DISPOSABLE SURGICAL DRAPE HAVING A PRIMARY OPERATIVE AREA, SAID DRAPE COMPRISING A FIBROUS BASE SHEET, A FLUID IMPERVIOUS PLASTIC LAYER CONVERING SAID PRIMARY OPERATIVE AREA, THE IMPROVEMENT COMPRISING A SHEET OF FLEXIBLE, NORMALLY HYDROPHOBIC, OPEN CELLED FOAM MATERIAL BONDED TO THE OUTER SURFACE OF SAID PLASTIC LAYER, SAID FOAM MATERIAL HAVING BEEN TREATED WITH THE REACTION PRODUCT OF A MINERAL ACID AND A FATTY ACID TERTIARY AMINE, SAID FATTY ACID TERITARY AMINE BEING NEUTRALIZED LESS THAN ABOUT 34 PERCENT TO FORM A FATTY ACID TERTIARY AMMONIUM SALT, SAID FATTY ACID TERTIARY AMINE HAVING THE STRUCTURAL FORMULA:
Claim 3
Dependent Claim
39 words
In a disposable surgical drape as defined in claim 1 wherein said reaction product is present in excess of about 0.125 gms/yd2 and the surface resistivity of the treated foam material is less than about 5 X 1011 ohms.
Claim 4
Dependent Claim
27 words
In a surgical drape as defined in claim 1, wherein said mineral acid is selected from the group consisting of phosphoric acid, hydrochloric acid and sulfuric acid.
Claim 5
Dependent Claim
17 words
In a surgical drape as defined in claim 1 wherein said foam material is a polyurethane foam.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |