Patent US5641719A successfully refreshed from Google Patents.
US5641719A
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Mixed oxide high index optical coating material and method
Assignee: Flex Products Inc
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Filing: 1995-05-09
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Granted: 1997-06-24
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Expires: 2015-05-09
Abstract
Abstract A composition of material of the formula MN x O y , where M and N are metals selected from groups IIIA, IVA and VA of the periodic table, O is oxygen and x and y have values such that the oxygen-to-metal ratio is less than 4 and the ratio of y/(1+x) is also less than 4, said material being in the form of a single oxide phase and having a crystal structure of a single type alone with no detectable crystal structure of a second type, said material being sub-stoichiometric.
Inventors
- 👤 Paul G. Coombs
- 👤 Russell E. DeLong
- 👤 Charlotte R. LeGallee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:31
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; C04B35/49; C04B35/46; C04B35/462; C04B35/495; C04B35/50; C04B35/505
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A composition of material of the formula MN x O y where M is Nb and N is Ti and O is oxygen and x and y have values such that the oxygen-to-metal ratio is less than 4 and the ratio of y/(1+x) is also less than 4, said material being in the form of a single oxide phase having a crystal structure of a single type alone without significant crystal structure of a second type, said material being sub-stoichiometric, said material having a crystal structure of the type of NbO 2 (niobium dioxide) alone with no significant crystal structure of the types Nb 2 O 5 or TiO 2 .
Claim 2
Dependent Claim
111 words
A composition of material of the formula MN x O y where M is Nb and N is Ti and O is oxygen and x and y have values such that the oxygen-to-metal ratio is less than 4 and the ratio of y/(1+x) is also less than 4, said material being in the form of a single oxide phase having a crystal structure of a single type alone without significant crystal structure of a second type, said material being sub-stoichiometric, said material having a crystal structure of the type of NbO 2 (niobium dioxide) alone with no significant crystal structure of the types Nb 2 O 5 or TiO 2 .
Claim 3
Dependent Claim
19 words
A material as in claim 1 wherein x=0.5 and y ranges from a value greater than 0 to 3.5.
Claim 4
Dependent Claim
19 words
A material as in claim 1 wherein said material has a formula of NbTi 0 .5 O 3 .0.
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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) | 2000-06-23 | 2000-12-23 | 2001-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-23 | 2004-12-23 | 2005-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-23 | 2008-12-23 | 2009-06-24 | $7700.00 | Window Closed / Lapsed |