Patent US5370900A successfully refreshed from Google Patents.
US5370900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin-fingered medical glove
Assignee: Ansell Healthcare Products LLC
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Filing: 1992-10-05
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Granted: 1994-12-06
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Expires: 2012-10-05
Abstract
Abstract A process for making medical gloves whose fingers have thinner walls than the rest of the gloves involves first depositing onto a hand-shaped glove form a layer of coagulant that comprises an ionic metal salt, then depositing an elastomeric layer. Part of the coated form is then leeched of metal ions in the coating, and the form is overcoated with a second elastomeric layer. The overcoated layer is thinner in the part where it overlies the leeched coating. The gloves find particular usefulness in delicate operations such as those performed by ophthalmologists.
Inventors
- 👤 Mao-Ching Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:52
CPC Classifications
A; A61; A61B; A61B42/00; A41; A41D; A41D19/00; A41D19/0055; A41D19/0058; B; B29; B29C; B29C41/00; B29C41/02; B29C41/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
144 words
A process for making a medical glove comprising the steps of: a) dip-coating onto a glove form a layer of coagulant that comprises an ionic metal salt, b) dip-coating over at least a part of the coagulant layer a layer of a first elastomer, the thickness of the elastomer layer being less than about 0.13 mm, c) immersing a first portion of the coagulant- and elastomer-coated form into a solvent for the metallic ions of the metal salt to remove essentially all the metallic ions in the layers, d) dip coating a layer of a second elastomer over the first elastomeric layer, whereby essentially no elastomer deposits on the first portion of the form and the resultant elastomer coating is thinner on the first portion of the form than on the remainder of the coated form, and e) removing the coating from the form.
Claim 2
Dependent Claim
144 words
A process for making a medical glove comprising the steps of: a) dip-coating onto a glove form a layer of coagulant that comprises an ionic metal salt, b) dip-coating over at least a part of the coagulant layer a layer of a first elastomer, the thickness of the elastomer layer being less than about 0.13 mm, c) immersing a first portion of the coagulant- and elastomer-coated form into a solvent for the metallic ions of the metal salt to remove essentially all the metallic ions in the layers, d) dip coating a layer of a second elastomer over the first elastomeric layer, whereby essentially no elastomer deposits on the first portion of the form and the resultant elastomer coating is thinner on the first portion of the form than on the remainder of the coated form, and e) removing the coating from the form.
Claim 3
Dependent Claim
18 words
The process of claim 1, in which the ionic metal salt is a salt of a bivalent metal.
Claim 4
Dependent Claim
14 words
The process of claim 2, in which the metal salt is a calcium salt.
Claim 5
Dependent Claim
13 words
The process of claim 3, in which the metal salt is calcium nitrate.
Claim 6
Dependent Claim
16 words
The process of claim 1, in which the first and second elastomers comprise the same material.
Claim 7
Dependent Claim
13 words
The process of claim 5, in which the elastomer is natural rubber latex.
Claim 8
Dependent Claim
25 words
The process of claim 1, in which the solvent for the metallic ions is selected from the group consisting of water, alcohol, and mixtures thereof.
Claim 9
Dependent Claim
18 words
The process of claim 7, in which the solvent is water at a temperature above about 20° C.
Claim 10
Dependent Claim
30 words
The process of claim 1, in which the first elastomeric layer is coated over an area of the form that is less than that over which the coagulant is coated.
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) | 1997-12-05 | 1998-06-06 | 1998-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-05 | 2002-06-06 | 2002-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-05 | 2006-06-06 | 2006-12-06 | $7700.00 | Window Closed / Lapsed |