US2746956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of silylating organic compounds
Assignee: Dow Silicones Corp
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Filing: 1953-06-16
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Granted: 1956-05-22
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Expires: 1973-06-16
Abstract
No abstract record available.
Inventors
- 👤 John L Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:59
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0898; C07F7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD OF SILYLATING ORGANIC COMPOUNDS WHICH COMPRISES REACTING AN ORGANIC COMPOUND CONTAINING AT LEAST ONE FUNCTIONAL GROUP SELECTED FROM THE GROUP CONSISTING OF GROUPS OF THE FORMULAE -XH AND -XM, WHERE X IS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR AND M IS A METAL, THERE BEING PRESENT IN SAID ORGANIC COMPOUND AT LEAST SOME XH GROUPS, WITH A MIXTURE OF A CHLOROSILANE OF THE FORMULA R3SICL AND A SILAZANE OF THE FORMULA (R3SI)2NH, IN WHICH CHLOROSILANE OF ALKYL EACH R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF LESS THAN 7 CARBON ATOMS AND PHENYL RADICALS, THE RELATIVE AMOUNTS OF THE CHLOROSILANE AND THE SILAZANE IN SAID REACTION BEING SUCH THAT THERE IS AT LEAST ENOUGH OF AN EQUIMOLAR MIXTURE OF THE CHLOROSILANE AND SILAZANE TO REACT WITH THE DESIRED AMOUNT OF ACTIVE HYDROGEN IN THE ORGANIC COMPOUND AND TO MAINTAIN THE REACTION MIXTURE IN A NEUTRAL CONDITION THROUGHOUT THE REACTION.
Claim 2
Independent Claim
157 words
A METHOD OF SILYLATING ORGANIC COMPOUNDS WHICH COMPRISES REACTING AN ORGANIC COMPOUND CONTAINING AT LEAST ONE FUNCTIONAL GROUP SELECTED FROM THE GROUP CONSISTING OF GROUPS OF THE FORMULAE -XH AND -XM, WHERE X IS SELECTED FROM THE GROUP CONSISTING OF OXYGEN AND SULFUR AND M IS A METAL, THERE BEING PRESENT IN SAID ORGANIC COMPOUND AT LEAST SOME XH GROUPS, WITH A MIXTURE OF A CHLOROSILANE OF THE FORMULA R3SICL AND A SILAZANE OF THE FORMULA (R3SI)2NH, IN WHICH CHLOROSILANE OF ALKYL EACH R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL RADICALS OF LESS THAN 7 CARBON ATOMS AND PHENYL RADICALS, THE RELATIVE AMOUNTS OF THE CHLOROSILANE AND THE SILAZANE IN SAID REACTION BEING SUCH THAT THERE IS AT LEAST ENOUGH OF AN EQUIMOLAR MIXTURE OF THE CHLOROSILANE AND SILAZANE TO REACT WITH THE DESIRED AMOUNT OF ACTIVE HYDROGEN IN THE ORGANIC COMPOUND AND TO MAINTAIN THE REACTION MIXTURE IN A NEUTRAL CONDITION THROUGHOUT THE REACTION.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |