Patent EP0340304A1 successfully refreshed from Google Patents.
US2636896A
Expired / Lapsed
US
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Organosiloxanes containing trifluoromethylphenyl groups
Assignee: Westinghouse Electric Corp
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Filing: 1949-09-29
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Granted: 1953-04-28
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Expires: 1969-09-29
Abstract
No abstract record available.
Inventors
- 👤 Lawrence W Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:04
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A SILOXANE COPOLYMER HAVING SI-O-SI LINK AGES AND WITH ORGANIC GROUPS ATTACHED TO THE SILICON ATOMS BY CARBON SILICON LINKAGES, THE ORGANIC GROUPS ATTACHED TO A PORTION OF THE SILICON ATOMS CONSISTING OF CF3C6H4 GROUPS, WHILE THE ORGANIC GROUPS ATTACHED TO THE REMAINING SILICON ATOMS CONSIST OF MONOVALENT HYDROCARBON RADICALS.
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) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |