US2580852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of siloxanes by reacting dialkyldichlorosilanes with cupric oxide
Assignee: WILLIAM EDWIN LANGRISH SMITH
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Filing: 1947-01-07
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Granted: 1952-01-01
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Expires: 1967-01-07
Abstract
No abstract record available.
Inventors
- 👤 Shaw Clifford
- 👤 Smith William Edwin
- 👤 Emblem Harold Garton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:20
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A PROCESS FOR THE PRODUCTION OF ALKYL SILICONE POLYMERS WHICH COMPRISES REFLUXING A DIALKYL SILICON DICHLORIDE UNDER ANHYDROUS CONDITIONS WITH CUPRIC OXIDE AND SEPARATING THE SILICONE POLYMER FROM THE METAL SALTS FORMED.
Claim 2
Dependent Claim
32 words
A PROCESS FOR THE PRODUCTION OF ALKYL SILICONE POLYMERS WHICH COMPRISES REFLUXING A DIALKYL SILICON DICHLORIDE UNDER ANHYDROUS CONDITIONS WITH CUPRIC OXIDE AND SEPARATING THE SILICONE POLYMER FROM THE METAL SALTS FORMED.
References Cited (Backward Citations)
US2452416A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |