US3714276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Difunctional tetrafluorobenzene
Assignee: Dow Silicones Corp
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Filing: 1970-08-27
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Granted: 1973-01-30
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Expires: 1990-08-27
Abstract
Abstract 2,4,5,6-tetrafluorobenzene compounds having Beta -hydroxyethyl, Beta -acetoxyethyl or vinyl difunctionality are disclosed. The Beta -hydroxyethyl and Beta -acetoxyethyl functional compounds are precursors to a divinyl-tetrafluorobenzene which can be reacted with *SiH compounds to provide siloxanes having *SiCH2CH2C6F4CH2CH2Si* linkages.
Inventors
- 👤 O Pierce
- 👤 J Greenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:12
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07C; C07C17/00; C07C25/00; C07C25/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3046313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |