US4406912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift-off element
Assignee: Brady Corp
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Filing: 1982-01-11
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Granted: 1983-09-27
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Expires: 2002-01-11
Abstract
Abstract A pressure-activated lift-off element in which a lift-off layer comprises a combination of at least one solid polyamide adhesive resin and oleic acid.
Inventors
- 👤 Gerald T. Downing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
C; C09; C09J; C09J177/00; B; B41; B41J; B41J29/00; B41J29/26; B41J29/36; B41J29/367; C09D; C09D9/00; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2852; Y10T428/2878; Y10T428/2887; Y10T428/31504; Y10T428/31725; Y10T428/31736
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
A lift-off element comprising a backing layer and a lift-off layer, said lift-off layer comprising a binder polyamide adhesive resin having a softening point at a first temperature and oleic acid.
Claim 2
Dependent Claim
31 words
A lift-off element comprising a backing layer and a lift-off layer, said lift-off layer comprising a binder polyamide adhesive resin having a softening point at a first temperature and oleic acid.
Claim 3
Dependent Claim
31 words
The element of claim 1 which includes also a second, wetting-softening polyamide adhesive resin with a softening point at a second temperature, said second temperature being less than said first temperature.
Claim 4
Dependent Claim
15 words
The element of claim 2 in which said lift-off layer includes also a tackifying resin.
Claim 5
Dependent Claim
12 words
The element of claim 3 in which said tackifying resin is rosin-derived.
Claim 6
Dependent Claim
60 words
The element of claim 3 in which said binding resin is present in the amount of a range of 35-45, said oleic acid is present in the amount of a range of 18-25, said wetting-softening resin is present in the amount of a range of 15-25, and said tackifying resin is present in the amount of a range of 5-15.
Claim 7
Dependent Claim
27 words
The element of claim 5 in which said element is a roll and said support layer has on an opposed side thereof a layer of release coating.
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) | 1986-09-26 | 1987-03-28 | 1987-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-26 | 1991-03-28 | 1991-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-26 | 1995-03-28 | 1995-09-27 | $7700.00 | Window Closed / Lapsed |