US3308146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysilylmethanes and their method of preparation
Assignee: Dow Silicones Corp
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Filing: 1962-12-03
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Granted: 1967-03-07
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Robert L Merker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:56
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/28; C10L1/285; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/0805; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A METHOD COMPRISING ADDING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DABRBCCL4-B-A AND PHXCX4-X, IN WHICH D IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND HYDROGEN, B IS AN INTEGER FROM 1 TO 4 INCLUSIVE, A IS 0 TO 1 INCLUSIVE, X IS 1 TO 2 INCLUSIVE AND X IS A HALOGEN HAVING AN ATOMIC WEIGHT ABOVE 19, TO A MIXTURE OF MAGNESIUM AND A SILANE OF THE FORMULA ME2RSICL IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF METHYL, HYDROGEN AND OR'' RADICALS WHERE R'' IS AN ALKYL RADICAL OF 1 TO 3 CARBON ATOMS IN A SOLVENT COMPRISING TETRAHYDROFURAN IN AMOUNT SUCH THAT THERE IS AT LEAST 1 MOL OF SILANE PER GRAM ATOM OF MAGNESIUM WHEREBY THERE IS OBTAINED A COMPOUND OF THE FORMULA
Claim 2
Independent Claim
130 words
A METHOD COMPRISING ADDING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DABRBCCL4-B-A AND PHXCX4-X, IN WHICH D IS SELECTED FROM THE GROUP CONSISTING OF METHYL AND HYDROGEN, B IS AN INTEGER FROM 1 TO 4 INCLUSIVE, A IS 0 TO 1 INCLUSIVE, X IS 1 TO 2 INCLUSIVE AND X IS A HALOGEN HAVING AN ATOMIC WEIGHT ABOVE 19, TO A MIXTURE OF MAGNESIUM AND A SILANE OF THE FORMULA ME2RSICL IN WHICH R IS SELECTED FROM THE GROUP CONSISTING OF METHYL, HYDROGEN AND OR'' RADICALS WHERE R'' IS AN ALKYL RADICAL OF 1 TO 3 CARBON ATOMS IN A SOLVENT COMPRISING TETRAHYDROFURAN IN AMOUNT SUCH THAT THERE IS AT LEAST 1 MOL OF SILANE PER GRAM ATOM OF MAGNESIUM WHEREBY THERE IS OBTAINED A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
76 words
A COMPOUND OF THE FORMULA (ME2RSI)NCR"4-N, IN WHICH N IS AN INTEGER FROM 2 TO 4 INCLUSIVE, R IS SELECTED FROM THE GROUP CONSISTING OF METHYL, HYDROGEN AND OR'' RADICALS WHERE R'' IS AN ALKYL RADICAL OF 1 TO 3 INCLUSIVE CARBON ATOMS AND WHEN PRESENT R" IS SELECTED FROM THE GROUP CONSISTING OF PHENYL AND HYDROGEN, AT LEAST ONE R" IS A PHENYL RADICAL, AND NO MORE THAN 1 R" RADICAL PER MOLECULE BEING HYDROGEN.
Claim 4
Dependent Claim
76 words
A COMPOUND OF THE FORMULA (ME2RSI)NCR"4-N, IN WHICH N IS AN INTEGER FROM 2 TO 4 INCLUSIVE, R IS SELECTED FROM THE GROUP CONSISTING OF METHYL, HYDROGEN AND OR'' RADICALS WHERE R'' IS AN ALKYL RADICAL OF 1 TO 3 INCLUSIVE CARBON ATOMS AND WHEN PRESENT R" IS SELECTED FROM THE GROUP CONSISTING OF PHENYL AND HYDROGEN, AT LEAST ONE R" IS A PHENYL RADICAL, AND NO MORE THAN 1 R" RADICAL PER MOLECULE BEING HYDROGEN.
References Cited (Backward Citations)
US2626266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |