US5252247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal (dialkylaminoalcoholate) solutions
Assignee: Akzo America Inc
•
Filing: 1991-03-13
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Granted: 1993-10-12
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Expires: 2011-03-13
Abstract
Abstract Solubilized metal (dialkylaminoalcoholate) compounds in organic solvent can serve as a source of metal values for metal oxide-containing superconductor compositions. Stable solutions, resistant to precipitation problems, can be formed by reaction of a dialkylaminoalkanol with a metal alkoxide followed by removal of by-product alkanol by vacuum distillation below the reflux temperature of the solution. Exemplary metals include copper, yttrium, barium, calcium, and bismuth, lanthanum and strontium.
Inventors
- 👤 Carl C. Greco
- 👤 Johst H. Burk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:02
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/08; Y; Y10; Y10S; Y10S505/00; Y10S505/725; Y10S505/734; Y10S505/735
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
36 words
A solution which consists essentially of: (a) an organic solvent; and (b) a metal (dialkylaminoalcoholate) compound dissolved therein, the metal being a metal oxide superconductor precursor selected from the group consisting of yttrium, bismuth, and lanthanum.
Claim 2
Dependent Claim
36 words
A solution which consists essentially of: (a) an organic solvent; and (b) a metal (dialkylaminoalcoholate) compound dissolved therein, the metal being a metal oxide superconductor precursor selected from the group consisting of yttrium, bismuth, and lanthanum.
Claim 3
Dependent Claim
12 words
A solution as claimed in claim 1 wherein the metal is yttrium.
Claim 4
Dependent Claim
12 words
A solution as claimed in claim 1 wherein the metal is bismuth.
Claim 5
Dependent Claim
12 words
A solution as claimed in claim 1 wherein the metal is lanthanum.
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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) | 1996-10-11 | 1997-04-12 | 1997-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-11 | 2001-04-12 | 2001-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-11 | 2005-04-12 | 2005-10-12 | $7700.00 | Window Closed / Lapsed |