US3725115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive adhesive articles and method of making same
Assignee: PPG Industries Inc
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Filing: 1970-06-18
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Granted: 1973-04-03
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Expires: 1990-06-18
Abstract
Abstract A PRESSURE-SENSITIVE ADHESIVE HAVING EXCELLENT PROPERTIES IS FORMED BY HEATING A SOLID RADIATION-SENSITIVE HOTMELT COMPOSITION OF TACKY LOW MOLECULAR WEIGHT POLYMERS WHICH ARE CAPABLE OF FORMING PRESSURE-SENSITIVE ADHESIVES TO A TEMPERATURE SUFFICIENTLY ABOVE ITS MELTING POINT AND AND APPLYING THE HOT-MELT COMPOSITION TO A BACKING AND SUBJECTING THE HOT-MELT COMPOSITION TO IONIZING IRRADIATION. THE RESULTING MATERIAL IS A STRONG PRESSURE-SENSITIVE ADHESIVE.
Inventors
- 👤 R Christenson
- 👤 C Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:22
CPC Classifications
B; B32; B32B; B32B38/00; B32B38/0008; C; C09; C09J; C09J5/00; C09J5/06; B32B7/00; B32B7/04; B32B7/12; C09J7/00; C09J7/20; C09J7/21; C09J7/30; C09J7/38; C09J7/381; C09J7/385; B32B37/00; B32B37/12; B32B37/1207; B32B2037/1215; B32B2310/00; B32B2310/08; B32B2310/0875; B32B2310/0881; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2839; Y10T428/2852; Y10T428/2878; Y10T428/2891; Y10T442/00; Y10T442/20; Y10T442/2738; Y10T442/2754
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |