US3110720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing cyclic diorganosiloxanes from diorganodihalosilanes and alkaliand alkali earth metal oxides and carbonates
Assignee: Union Carbide Corp
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Filing: 1960-11-01
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Granted: 1963-11-12
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Roscoe A Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:18
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/21; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR PRODUCING CYCLIC DIORGANOSILOXANES WHICH INVOLVES FORMING A REACTION MIXTURE CONTAINING (1) A DIORGANODIHALOSILANE, WHEREIN THE ORGANO GROUPS ARE MONOVALENT HYDROCARBON GROUPS HAVING FROM 0 TO 1 CYANO GROUP AND FROM 0 TO 1 CARBOHYDROCARBONOXY GROUP AS SUBSTITUENTS, AND (2) AN NORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL OXIDES, ALKALI METAL CARBONATES AND ALKALI EARTH METAL CARBONATES AND MAINTAINING THE MIXTURE AT A TEMPERATURE OF AT LEAST 200*C. IN THE ABSENCE OF WATER AND ANY ORGANIC SOLVENT TO PRODUCE CYCLIC DIORGANOSILOXANES.
Claim 2
Dependent Claim
87 words
A PROCESS FOR PRODUCING CYCLIC DIORGANOSILOXANES WHICH INVOLVES FORMING A REACTION MIXTURE CONTAINING (1) A DIORGANODIHALOSILANE, WHEREIN THE ORGANO GROUPS ARE MONOVALENT HYDROCARBON GROUPS HAVING FROM 0 TO 1 CYANO GROUP AND FROM 0 TO 1 CARBOHYDROCARBONOXY GROUP AS SUBSTITUENTS, AND (2) AN NORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE ALKALI METAL OXIDES, ALKALI METAL CARBONATES AND ALKALI EARTH METAL CARBONATES AND MAINTAINING THE MIXTURE AT A TEMPERATURE OF AT LEAST 200*C. IN THE ABSENCE OF WATER AND ANY ORGANIC SOLVENT TO PRODUCE CYCLIC DIORGANOSILOXANES.
References Cited (Backward Citations)
US2452416A
Cited
GB606301A
Cited
US2580852A
Cited
US2646441A
Cited
US2629725A
Cited
US2744923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |