US3565858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat convertible organopolysiloxane compositions
Assignee: Bayer AG
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Filing: 1968-08-15
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Granted: 1971-02-23
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Expires: 1988-08-15
Abstract
Abstract COMPOSITIONS COMPRISING LINEAR ORGANOPOLYSILOXANES, WHICH ARE TO BE CONVERTED INTO A SOLID ELASTIC STATE BY ADDING AN ORGANIC PEROXIDE AND SUBSEQUENT MOULDING AND HEATING, CAN BE IMPROVED ACCORDING TO THE INVENTION BY A TREATMENT WHICH COMPRISES THE ADDITION OF CERTAIN COMPOUNDS RELEASING NITROGEN AT ELEVATED TEMPERATURE, AND HEATING THE RESULTANT MIXTURE AT THE SAME TIME OR LATER UNTIL THESE NITROGEN COMPOUNDS HAVE BEEN DECOMPOSED. SUCH TREATMENT ENABLES THE COMPOSITION TO BE CONVERTED WITHOUT THE EXTENSIVE FINAL HEAT-TREATMENT OF THE MOULDED ARTICLES, WHICH IS NECESSARY IN THE PROCEDURE HITHERTO KNOWN IN THE ART.
Inventors
- 👤 Wilfried Kniege
- 👤 Karl Schnurrbusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:30
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C08K5/22; C08K5/23; C08K5/36; C08K5/43
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |