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Patent US2628243A successfully refreshed from Google Patents.
US2628243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organochlorosilanes
Assignee: Dow Silicones Corp
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Filing: 1950-10-14
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Granted: 1953-02-10
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Expires: 1970-10-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Barry
- 👤 John W Gilkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:38
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE METHOD WHICH COMPRISES HEATING A CHLOROSILANE OF THE FORMULA R(CH3) NSICL3-N WHERE R IS AN ALKYL RADICAL OF AT LEAST 2 CARBON ATOMS, AND N HAS A VALUE FROM 0 TO 1, AT A TEMPERATURE OF FROM 350* C TO 800* C., WHEREBY LOWER ALIPHATIC CHLOROSILANES ARE PRODUCED.
Claim 2
Independent Claim
49 words
THE METHOD WHICH COMPRISES HEATING A CHLOROSILANE OF THE FORMULA R(CH3) NSICL3-N WHERE R IS AN ALKYL RADICAL OF AT LEAST 2 CARBON ATOMS, AND N HAS A VALUE FROM 0 TO 1, AT A TEMPERATURE OF FROM 350* C TO 800* C., WHEREBY LOWER ALIPHATIC CHLOROSILANES ARE PRODUCED.
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) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |