US4982019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Volatile divalent metal alkoxides
Assignee: United States Department of the Navy
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Filing: 1989-07-31
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Granted: 1991-01-01
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Expires: 2009-07-31
Abstract
Abstract The invention relates to precursors useful for the preparation by CVD of superconducting thin films. The precursors are the volatile alkoxides of the formula M(OR) 2 , wherein M is selected from the group consisting of Ba, Ca, and Sr, and R is selected from the group consisting of unsubstituted alkyl groups of 6 to 13 carbons and halogen substituted alkyl groups of 3 to 4 carbons wherein the halogen is selected from the group consisting of fluoride and chlorine and at least two of the halogen substitutions are fluorine. The secondary or tertiary alkyl groups are preferred and the tertiary alkyl groups are most preferred.
Inventors
- 👤 Andrew Purdy
- 👤 Alan D. Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:09
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/28; C07C31/30; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/734
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
62 words
A compound of the formula M(OR) 2 , wherein M is selected from the group consisting of Ba, Ca, and Sr, and R is selected from the group consisting of halogen substituted alkyl groups of 3 to 4 carbons wherein the halogen is selected from the group consisting of fluorine and chlorine and at least two of the halogen substitutions are fluorine.
Claim 2
Dependent Claim
62 words
A compound of the formula M(OR) 2 , wherein M is selected from the group consisting of Ba, Ca, and Sr, and R is selected from the group consisting of halogen substituted alkyl groups of 3 to 4 carbons wherein the halogen is selected from the group consisting of fluorine and chlorine and at least two of the halogen substitutions are fluorine.
Claim 3
Dependent Claim
63 words
A compound of the formula M(OR) 2 wherein M is selected from the group consisting of Ba, Ca, and Sr, and R is selected from the group consisting of C(CF 3 ) 3 , CH(CF 3 ) 2 , C(CF 3 ) 2 Me, C(CF 2 Cl) 3 , C(CF 3 ) 2 CCL 3 , C(CF 2 Cl) 2 CCl 3 .
Claim 4
Dependent Claim
63 words
A compound of the formula M(OR) 2 wherein M is selected from the group consisting of Ba, Ca, and Sr, and R is selected from the group consisting of C(CF 3 ) 3 , CH(CF 3 ) 2 , C(CF 3 ) 2 Me, C(CF 2 Cl) 3 , C(CF 3 ) 2 CCL 3 , C(CF 2 Cl) 2 CCl 3 .
Claim 5
Dependent Claim
18 words
The compound of claim 3 where in M is Ba and R is C(CF 3 ) 3 .
Claim 6
Dependent Claim
18 words
The compound of claim 3 where in M is Ca and R is C(CF 3 ) 3 .
Claim 7
Dependent Claim
17 words
The compound of claim 3 wherein M is Sr and R is C(CF 3 ) 3 .
References Cited (Backward Citations)
US4260712A
Cited
US4717584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |