US3704196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-curing sealant compositions
Assignee: Covestro International SA
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Filing: 1969-12-22
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Granted: 1972-11-28
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Expires: 1989-12-22
Abstract
Abstract TAPES FOR SEALING WINDOWS IN AUTOMOTIVE AND ARCHITECTURAL APPLICATIONS ARE FORMULATED FROM BUTYL RUBBER, A PLASTICIZER AND CARBON BLACK. MINOR AMOUNTS OF RESORCINOL, A FORMALDEHYDE DONOR AND A SILICAL FILLER ARE ALSO INCLUDED IN THE FORMULATION TO PROVIDE A SELF-CURING TAPE WHICH SLOWLY VULCANIZES IN SERVICE AND WHICH IS CHARACTERIZED BY EXCELLENT BOND STRENGTH AND LOW HEAT FLOW.
Inventors
- 👤 John E Callan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:04
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/34; C09J; C09J123/00; C09J123/02; C09J123/18; C09J123/20; C09J123/22; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |