US3690937A
Expired / Lapsed
US
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Process of making a pressure-sensitive adhesive material
Assignee: Beiersdorf AG
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Filing: 1970-08-03
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Granted: 1972-09-12
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Expires: 1990-08-03
Abstract
Abstract A PRESSURE SENSITIVE ADHESIVE MATERIAL IS MADE BY COATING A SUBSTRATE WITH A COPOLYMER OF SPECIFIED PROPORTIONS OF A DIESTER OF FUMARIC ACID, AND A VINYL COMPOUND COPOLYMERISABLE THEREWITH AS WELL AS EITHER OR BOTH OF AN OLEFINICALLY UNSATURATED COPOLYMERISABLE POLAR COMPOUND WITH CARBOXYL, CARBOXAMIDE, DICARBOXYLIC ANHYDRIDE OR DICARBOXYIMIDE GROUPS, AND AN OLEFINICALLY UNSATURATED COPOLYMERISABLE COMPOUND WITH SELF-CROSS-LINKABLE REACTIVE GROUPS, TOGETHER WITH A CROSS-LINKING POLYFUNCTIONAL COMPOUND, AND SUBJECTING THE COATING THEREON TO A SHORT PERIOD HEAT TREATMENT.
Inventors
- 👤 Gunter Guse
- 👤 Hanns G Pietsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:43
CPC Classifications
C; C08; C08F; C08F222/00; C08F222/10; C08F222/12; C08F222/14; C08F222/145; B; B32; B32B; B32B7/00; B32B7/04; B32B7/12; C07; C07D; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/135; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6266; C09; C09J; C09J135/00; C09J135/02; C09J7/00; C09J7/20; C09J7/22; C09J7/30; C09J7/38; C09J7/381; B32B2405/00; C08G2170/00; C08G2170/40; C08L; C08L2666/00; C08L2666/02; C08L2666/14; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2852; Y10T428/2878; Y10T428/2891
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |