US2666035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reclaimed silicone rubber
Assignee: General Electric Co
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Filing: 1951-11-15
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Granted: 1954-01-12
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Expires: 1971-11-15
Abstract
No abstract record available.
Inventors
- 👤 Charles W Pfeifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:41
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08G; C08G77/00; C08G77/04; C08G77/14; C08G77/16; C08G77/20; C08G77/32; C08G77/34; C08L; C08L83/00; C08L83/04; B; B29; B29K; B29K2083/00; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
A COMPOSITION OF MATTER COMPRISING, BY WEIGHT, (1) FROM 50 TO 95 PER CENT OF A NONRECLAIMED, PREVIOUSLY UNVULCANIZED METHYL POLYSILOXANE CONVERTIBLE BY HEAT TO THE SOLID ELASTIC STATE AND (2) FROM 5 TO 50 PER CENT OF A RECLAIMED, VULCANIZABLE, SOLID, ELASTIC METHYL POLYSILOXANE CONVERTIBLE BY HEAT TO THE SOLID, ELASTIC, SUBSTANTIALLY INFUSIBLE AND INSOLUBLE STATE OBTAINED BY COMMINUTING TO A FINELY DIVIDED STATE A SOLID, ELASTIC METHYL POLYSILOXANE WHICH IS IN AT LEAST A PARTIALLY CURED STATE, AND THEREAFTER SUBJECTING THE FINELY DIVIDED MATERIAL IN A CLOSED PRESSURE VESSEL AT ELEVATED TEMPERATURES TO DIRECT CONTACT WITH PRESSURIZED STEAM UNTIL A READILY MILLABLE AND PEROXIDE-VULCANIZABLE PRODUCT IS OBTAINED, BOTH METHYL POLYSILOXANES OF (1) AND (2) CONTAINING AN AVERAGE OF FROM 1.75 TO 2.25 METHYL GROUPS PER SILICON ATOM.
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) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |