Patent US3628987A successfully refreshed from Google Patents.
US3628987A
Expired / Lapsed
US
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Pressure sensitive adhesive film
Assignee: Sekisui Chemical Co Ltd
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Filing: 1968-07-08
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Granted: 1971-12-21
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Expires: 1988-07-08
Abstract
Abstract This invention relates to pressure sensitive adhesive films wherein the film surface has graft polymerized thereto a vinyl monomer or a diene monomer and wherein an adhesive material overlays the graft polymerized surface. The adhesive material has a solubility parameter near that of polymers of the vinyl or diene monomer.
Inventors
- 👤 Shinsaku Nakata
- 👤 Hitoshi Hori
- 👤 Kohei Tagami
- 👤 Masaru Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:42
CPC Classifications
C; C09; C09J; C09J7/00; C09J7/20; C09J7/22; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2843; Y10T428/2852; Y10T428/2857; Y10T428/31504; Y10T428/31826; Y10T428/31833
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
A pressure-sensitive adhesive film as in claim 1 wherein said adhesive is a rubber type adhesive.
Claim 2
Dependent Claim
25 words
A pressure-sensitive adhesive film as in claim 2 wherein a principal ingredient of the adhesive is a graft polymer of the same monomer to rubber.
Claim 3
Dependent Claim
17 words
A pressure-sensitive adhesive film as in claim 1 wherein said adhesive is a synthetic resin type adhesive.
Claim 4
Dependent Claim
67 words
A pressure-sensitive adhesive film comprising a flexible synthetic resin film selected from the group consisting of polyethylene and polypropylene, the surface of said film having graft-polymerized thereto at least one graft-polymerizable monomer selected from the group consisting of vinyl monomers and diene monomers, a primer having a solubility parameter near that of polymers of said monomer on said graft-polymerized surface, and a pressure-sensitive adhesive on said primer.
Claim 5
Dependent Claim
19 words
A pressure-sensitive adhesive film as in claim 5 wherein a principal ingredient of the primer is the graft polymer.
Claim 6
Dependent Claim
17 words
A pressure-sensitive adhesive film as in claim 5 wherein a principal ingredient of the primer is rubber.
Claim 7
Dependent Claim
19 words
A pressure-sensitive adhesive film as in claim 5 wherein a principal ingredient of thE primer is a synthetic resin.
References Cited (Backward Citations)
US2999772A
Cited
US2922723A
Cited
US3101275A
Cited
US3170892A
Cited
US3265769A
Cited
US3241662A
Cited
US3322661A
Cited
US3353987A
Cited
US3401213A
Cited
US3197326A
Cited
US3402059A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |