US2572402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organo silanes and their production
Assignee: Dow Silicones Corp
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Filing: 1948-03-17
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Granted: 1951-10-23
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Expires: 1968-03-17
Abstract
No abstract record available.
Inventors
- 👤 Jr John Leopold Speier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:24
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE METHOD OF PREPARING COMPOUNDS OF THE TYPE (CH3) 3SICH2OR IN WHICH R REPRESENTS AN ALKYL RADICAL WHICH COMPRISES INTERACTING CHLOROTRIMETHYISILANE, A CHLOROMETHYL ALKYL ETHER AND SODIUM BY CONTACTING THE REAGENTS IN LIQUID PHASE WITH METALLIC SODIUM.
Claim 2
Independent Claim
37 words
THE METHOD OF PREPARING COMPOUNDS OF THE TYPE (CH3) 3SICH2OR IN WHICH R REPRESENTS AN ALKYL RADICAL WHICH COMPRISES INTERACTING CHLOROTRIMETHYISILANE, A CHLOROMETHYL ALKYL ETHER AND SODIUM BY CONTACTING THE REAGENTS IN LIQUID PHASE WITH METALLIC SODIUM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |