US2711399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone rubber with preaged carbon black
Assignee: General Electric Co
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Filing: 1952-02-06
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Granted: 1955-06-21
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Expires: 1972-02-06
Abstract
No abstract record available.
Inventors
- 👤 Smith-Johannsen Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:18
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/34; C08K3/36; C08K5/00; C08K5/04; C08K5/14; C08L; C08L83/00; C08L83/04; C09; C09D; C09D183/00; C09D183/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A COMPOSITION OF MATTER COMPRISING (1) AN ALKALINECONDENSED, BENZEND-SOLUBLE POLYDIORGANOSILOXANE CONALL THE STRUCTURAL UNITS ARE R2SIO WHERE R REPRESENT RADICALS, SOME OF WHICH MAY BE UNLIKE, SELECTED FROM THE CLASS CONSISTING OF LOWER ALKYL RADICALS AND ARYL RADICALS AND IN WHICH POLYDIORGANOSILOXANE AT LEAST 75% OF THE TOTAL NUMBER OF R GROUPS ARE LOWER ALKYL RADICALS, (2) AT LEAST 25%, BY WEIGHT, OF AN INORGANIC METALLIC OXIDE FILLER BASED ON THE WEIGHT OF THE AFORESAID POLYDIORGANOSILOXANE, AND (3) POLYDIORGANOSILOXANE OF FINELY DIVIDED CARBON IN THE FORM OF A PERFORMED AGED CONCENTRATE OBTAINTED BY PERMITTING FROM ONE TO TWO PARTS, BY WEIGHT, OF THE CARBON TO REMAIN IN INTIMATE CONTACT WITH FROM ONE TO TEN PARTS, BY WEIGHT, OF A POLYDIORGANOSILOXANE DESCRIBED IN (1) ABOVE FOR A TIME SUFFICIENT TO EFFECT INTERACTION BETWEEN THE LATTER AND THE CARBON.
Claim 2
Dependent Claim
137 words
A COMPOSITION OF MATTER COMPRISING (1) AN ALKALINECONDENSED, BENZEND-SOLUBLE POLYDIORGANOSILOXANE CONALL THE STRUCTURAL UNITS ARE R2SIO WHERE R REPRESENT RADICALS, SOME OF WHICH MAY BE UNLIKE, SELECTED FROM THE CLASS CONSISTING OF LOWER ALKYL RADICALS AND ARYL RADICALS AND IN WHICH POLYDIORGANOSILOXANE AT LEAST 75% OF THE TOTAL NUMBER OF R GROUPS ARE LOWER ALKYL RADICALS, (2) AT LEAST 25%, BY WEIGHT, OF AN INORGANIC METALLIC OXIDE FILLER BASED ON THE WEIGHT OF THE AFORESAID POLYDIORGANOSILOXANE, AND (3) POLYDIORGANOSILOXANE OF FINELY DIVIDED CARBON IN THE FORM OF A PERFORMED AGED CONCENTRATE OBTAINTED BY PERMITTING FROM ONE TO TWO PARTS, BY WEIGHT, OF THE CARBON TO REMAIN IN INTIMATE CONTACT WITH FROM ONE TO TEN PARTS, BY WEIGHT, OF A POLYDIORGANOSILOXANE DESCRIBED IN (1) ABOVE FOR A TIME SUFFICIENT TO EFFECT INTERACTION BETWEEN THE LATTER AND THE CARBON.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |