Patent EP0425783A1 successfully refreshed from Google Patents.
Patent US6379368B1 successfully refreshed from Google Patents.
US2803619A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low compression set siloxane elastomers containing a vinyl organosiloxane
Assignee: Dow Silicones Corp
•
Filing: 1954-12-23
•
Granted: 1957-08-20
•
Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 Norbert G Dickmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:43
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A HEAT HARDENABLE COMPOSITION OF MATTER COMPRISING A MIXTURE OF (1) A DIORGANOPOLYSILOXANE GUM IN WHICH THE ORGANIC RADICALS ARE ALL ATTACHED TO THE SILICON THROUGH SILICON-CARBON LINKAGES, ALL OF SAID ORGANIC RADICALS BEING FREE OF ALIPHATIC UNSATURATION, (2) A VINYL CONTAINING ORGANOSILOXANE IN WHICH ALL OF THE VINYL RADICALS AND ANY OTHER ORGANIC RADILCALS PRESENT IN SAID SILOXANE (2) ARE ATTACHED TO THE SILICON THROUGH SILICON-CARBON LINKAGES, THE PROPORTIONS OF (1) AND (2) BEING SUCH THAT IN THE SILOXANE MIXTURE THERE IS FROM 1 VINYL RADICAL PER 5,000 SILICON ATOMS TO 1 VINYL RADICAL PER 20,000 SILICON ATOMS AND (3) AN ORGANIC PEROXIDE VULCANIZING AGENT.
Claim 2
Dependent Claim
106 words
A HEAT HARDENABLE COMPOSITION OF MATTER COMPRISING A MIXTURE OF (1) A DIORGANOPOLYSILOXANE GUM IN WHICH THE ORGANIC RADICALS ARE ALL ATTACHED TO THE SILICON THROUGH SILICON-CARBON LINKAGES, ALL OF SAID ORGANIC RADICALS BEING FREE OF ALIPHATIC UNSATURATION, (2) A VINYL CONTAINING ORGANOSILOXANE IN WHICH ALL OF THE VINYL RADICALS AND ANY OTHER ORGANIC RADILCALS PRESENT IN SAID SILOXANE (2) ARE ATTACHED TO THE SILICON THROUGH SILICON-CARBON LINKAGES, THE PROPORTIONS OF (1) AND (2) BEING SUCH THAT IN THE SILOXANE MIXTURE THERE IS FROM 1 VINYL RADICAL PER 5,000 SILICON ATOMS TO 1 VINYL RADICAL PER 20,000 SILICON ATOMS AND (3) AN ORGANIC PEROXIDE VULCANIZING AGENT.
References Cited (Backward Citations)
US2442196A
Cited
US2445794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |