US3690925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding polypropylene or a copolymer of ethylene and propylene to an elastomer
Assignee: Dunlop Holdings Ltd
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Filing: 1970-06-08
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Granted: 1972-09-12
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Expires: 1990-06-08
Abstract
Abstract A METHOD OF MODIFYING A POLYALKENE WHICH COMPRISES APPLYING TO THE SURFACE OF THE POLYALKENE A SOLUTION CONTAINING 0.025 TO 10 PERCENT BY WEIGHT OF A POLYALKENE WHICH IS THE SAME OR DIFFERENT FROM THE POLYALKENE TO BE TREATED. EXAMPLES OF SUITABLE POLYALKENES WHICH MAY BE MODIFIED INCLUDE POLYPROPYLENE AND PROPYLENE/ETHYLENE COPOLYMERS. SUITABLE SOLVENTS FROM FORMING THE SOLUTION OF THE POLYALKENE INCLUDE WHITE SPIRITS, PARAFFIN, HEAVY COAL TAR NAPHTHA, TOLUENE AND XYLENE. THE MODIFIED SURFACE OF THE POLYALKENE MAY BE BONDED TO AN ELASTOMER SUCH AS NATURAL RUBBER, STYRENE BUTADIENE COPOLYMER RUBBERS AND ACRYLONITRILE RUBBERS.
Inventors
- 👤 Raymond J T Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:17
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/227; C08J2321/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31844; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 0
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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 |