Patent US5232784A successfully refreshed from Google Patents.
US5232784A
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Release film for label stock
Assignee: Mobil Oil AS
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Filing: 1991-12-20
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Granted: 1993-08-03
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Expires: 2011-12-20
Abstract
Abstract A release film for label stock including a film substrate having a coating of a silicone-acrylate release material which includes a quaternary ammonium salt therein.
Inventors
- 👤 Hachul C. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:17
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C09; C09J; C09J7/00; C09J7/40; C09J7/401; C09J7/403; C08J2453/00; C09J2203/00; C09J2203/334; C09J2400/00; C09J2400/20; C09J2400/22; C09J2400/226; C09J2433/00; C09J2433/005; C09J2483/00; C09J2483/005; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
47 words
A release film for label stock comprising a film substrate having on one side thereof a coating of a silicone-acrylate release material, said coating including a quaternary ammonium salt therein in an amount sufficient to prevent any transfer of said release material from said one side thereof.
Claim 2
Dependent Claim
47 words
A release film for label stock comprising a film substrate having on one side thereof a coating of a silicone-acrylate release material, said coating including a quaternary ammonium salt therein in an amount sufficient to prevent any transfer of said release material from said one side thereof.
Claim 3
Dependent Claim
13 words
The film of claim 1 wherein said substrate is an oriented thermoplastic film.
Claim 4
Dependent Claim
13 words
The film of claim 2 wherein said substrate is an isotactic polypropylene film.
Claim 5
Dependent Claim
22 words
The film of claim 3 wherein said quaternary ammonium salt is present in said release material in from about 0.2-8% by weight.
Claim 6
Dependent Claim
82 words
In a release film for label stock comprising a film substrate having on one side thereof a coating of a silicone-acrylate release material, a minor fraction of said release material having a tendency to undesirably transfer to the opposite side of said release film upon convolute winding thereof, the improvement consisting of including in said release material an amount of a quaternary ammonium salt sufficient to prevent any meaningful transfer of said release material from said one side to any other surface.
Claim 7
Dependent Claim
82 words
In a release film for label stock comprising a film substrate having on one side thereof a coating of a silicone-acrylate release material, a minor fraction of said release material having a tendency to undesirably transfer to the opposite side of said release film upon convolute winding thereof, the improvement consisting of including in said release material an amount of a quaternary ammonium salt sufficient to prevent any meaningful transfer of said release material from said one side to any other surface.
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) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |