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US3192175A
Expired / Lapsed
US
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Sealant composition of 3, 3, 3-trifluoropropylmethylsiloxane gums
Assignee: Dow Silicones Corp
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Filing: 1962-09-27
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Granted: 1965-06-29
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 James R Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:31
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C08L83/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
A SEALANT COMPOSITION HAVING A PLASTICITY NUMBER OF 240 TO 320 CONSISTS ESSENTIALLY OF 100 PARTS BY WEIGHT OF A GUM, SAID GUM CONSISTING ESSENTIALLY OF 99.5 MOL PERCENT OF 3,3,3-TRIFLUOROPROPYLMETHYLSILOXANE AND 0.5 MOL PERCENT VINYLMETHYLSILOXANE, 90 TO 160 PARTS BY WEIGHT OF A 3,3,3-TRIFLUOROPROPYLMETHYLSILOXANE FLUID HAVING A VCISCOSITY FROM 30,000 TO 60,000 CS., 10 TO 30 PARTS BY WEIGHT OF A FINELY DIVIDED SILICA HAVING A SURFACE AREA OF AT LEAST 100 SQELY DIVIDED SILICA HAVING A SURFACE AREA OF AT LEAST 100 SQUARE METERS PER GRAM AND 5 TO 20 PARTS BY WEIGHT OF A POLYTETRAFLUOROETHYLENE RESIN HAVING AN AVERAGE PARTICLE SIZE OF LESS THAN ONE MICRON.
References Cited (Backward Citations)
US2927908A
Cited
US3006878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |