Patent US4337205A successfully refreshed from Google Patents.
US4337205A
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Nitrogen containing alkoxysilane and process for its production
Assignee: Evonik Operations GmbH
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Filing: 1980-08-28
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Granted: 1982-06-29
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Expires: 2000-08-28
Abstract
Abstract There are prepared nitrogen containing alkoxysilanes of the formula (RO)3-n(CH3)nSi(CH2)mNHCON3 in which R is an alkyl group having 1 to 3 carbon atoms, n is 0, 1 or 2 and m is 1, 2 or 3 by a process comprising dissolving in an inert solvent an isocyanate group containing silane of the formula (RO)3-n(CH3)nSi(CH2)mN=C=O in which R, n and m are as defined above and reacting the silane with a water free hydrogen nitride or with hydrogen halide and an alkali metal-alkaline earth metal-, or ammonium azide at a temperature between 0 DEG C. and the boiling point of the inert solvent. The compounds are useful in making phosphinimines.
Inventors
- 👤 Wolfgang Buder
- 👤 Siegfried Wolff
- 👤 Peter Kleinschmit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:44
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/18; C07F7/1804
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
37 words
A nitrogen containing alkoxysilane of the formula (RO).sub.3-n (CH.sub.3).sub.n Si(CH.sub.2).sub.m NHCON.sub.3 in which R is an alkyl group having 1 to 3 carbon atoms, n is 0, 1 or 2 and m is 1, 2 or 3.
Claim 2
Dependent Claim
37 words
A nitrogen containing alkoxysilane of the formula (RO).sub.3-n (CH.sub.3).sub.n Si(CH.sub.2).sub.m NHCON.sub.3 in which R is an alkyl group having 1 to 3 carbon atoms, n is 0, 1 or 2 and m is 1, 2 or 3.
Claim 3
Dependent Claim
10 words
An alkoxysilane according to claim 1 where n is 0.
Claim 4
Dependent Claim
10 words
An alkoxysilane according to claim 2 where R is methyl.
Claim 5
Dependent Claim
10 words
An alkoxysilane according to claim 3 where m is 1.
Claim 6
Dependent Claim
10 words
An alkoxysilane according to claim 3 where m is 3.
Claim 7
Dependent Claim
12 words
An alkoxysilane according to claim 1 where n is 1 or 2.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |