Patent US3209018A successfully refreshed from Google Patents.
US3209018A
Expired / Lapsed
US
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Silarylenesilanes, cyclotrisiloxanes, and the preparation of silanols
Assignee: Dow Silicones Corp
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Filing: 1960-07-22
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Granted: 1965-09-28
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Expires: 1980-07-22
Abstract
No abstract record available.
Inventors
- 👤 Robert L Merker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:22
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C07F7/0896; C08; C08G; C08G77/00; B01J31/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A SILARYLENESILANE OF THE FORMULA
Claim 2
Dependent Claim
5 words
A SILARYLENESILANE OF THE FORMULA
Claim 3
Dependent Claim
5 words
A CYCLOTRISILOXANE OF THE FORMULA
Claim 4
Dependent Claim
5 words
A CYCLOTRISILOXANE OF THE FORMULA
Claim 5
Dependent Claim
93 words
A PROCESS FOR PRODUCING A SILLARYLENESILANE DIOL HAVING THE FORMULA (HO)R2SIR''SIR2(OH), WHERE EACH R IS A MONOVALENT HYDROCARBON RADICAL FREE OF ALIPHATIC UNSATURATION AND R'' IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF P-PHENYLENE, 4,4''-BIPHENYLENE, 4,4''DIPHENYLENE ETHER, P-XYLYLENT, AND 4,4''-DIMETHYLENEDIPHENYL ETHER RADICALS WHICH COMPRISES SUBJECTING A COMPOUND OF THE FORMULA HR2SIR''SIR2H WHERE AND R'' ARE AS ABOVE DEFINED, TO ALCOHOLYSIS WHEREBY THE SILICON-BONDED HYDROGEN ATOMS ARE REPLACED BY ALKOXY GROUPS, AND HYDROLYZING SAID ALKOXY GROUPS UNDER CONDITIONS SUCH THAT SUBSTANTIALLY ALL OF SAID ALKOXY GROUPS ARE REPLACED BY SILICON-BONDED HYDROXY GROUPS.
Claim 6
Dependent Claim
93 words
A PROCESS FOR PRODUCING A SILLARYLENESILANE DIOL HAVING THE FORMULA (HO)R2SIR''SIR2(OH), WHERE EACH R IS A MONOVALENT HYDROCARBON RADICAL FREE OF ALIPHATIC UNSATURATION AND R'' IS A DIVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF P-PHENYLENE, 4,4''-BIPHENYLENE, 4,4''DIPHENYLENE ETHER, P-XYLYLENT, AND 4,4''-DIMETHYLENEDIPHENYL ETHER RADICALS WHICH COMPRISES SUBJECTING A COMPOUND OF THE FORMULA HR2SIR''SIR2H WHERE AND R'' ARE AS ABOVE DEFINED, TO ALCOHOLYSIS WHEREBY THE SILICON-BONDED HYDROGEN ATOMS ARE REPLACED BY ALKOXY GROUPS, AND HYDROLYZING SAID ALKOXY GROUPS UNDER CONDITIONS SUCH THAT SUBSTANTIALLY ALL OF SAID ALKOXY GROUPS ARE REPLACED BY SILICON-BONDED HYDROXY GROUPS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |