US2521267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of alkylating alkoxy silanes
Assignee: Uddeholms AB
•
Filing: 1948-08-23
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Granted: 1950-09-05
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Expires: 1968-08-23
Abstract
No abstract record available.
Inventors
- 👤 Tiganik Leonhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:23
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804; C07F7/1872; C07F7/1876
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A METHOD OF ALKYLATING ALKOXY SILANES BY MEANS OF ALKYL CHLORIDE IN WHICH THE ALKYL CHLORIDE IS BROUGHT TO REACTION WITH THE ALKOXY SILANE IN THE PRESENCE OF SODIUM WHICH IS ACTIVATED WITH A SMALL AMOUNT OF AT LEAST ONE OF THE METALS OF THE GROUP CONSISTING OF COPPER, TIN AND SILVER.
Claim 2
Independent Claim
52 words
A METHOD OF ALKYLATING ALKOXY SILANES BY MEANS OF ALKYL CHLORIDE IN WHICH THE ALKYL CHLORIDE IS BROUGHT TO REACTION WITH THE ALKOXY SILANE IN THE PRESENCE OF SODIUM WHICH IS ACTIVATED WITH A SMALL AMOUNT OF AT LEAST ONE OF THE METALS OF THE GROUP CONSISTING OF COPPER, TIN AND SILVER.
References Cited (Backward Citations)
US2386452A
Cited
GB573906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |