US5385709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state chemical micro-reservoirs
Assignee: University of Michigan (System)
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Filing: 1993-06-24
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Granted: 1995-01-31
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Expires: 2013-06-24
Abstract
Abstract The present invention relates to a method for storing chemical reagents in micro-reservoirs, a chemical sensor system and a chemical micro-reactor.
Inventors
- 👤 Kensall D. Wise
- 👤 Johannes W. Schwank
- 👤 John L. Gland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:41
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0093; G; G01; G01N; G01N35/00; G01N35/10; G01N35/1002; G01N2035/00178; G01N2035/00237; G01N27/00; G01N27/02; G01N27/04; G01N27/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
119 words
A method for storing a chemical in a chemical micro-reservoir comprising: i) absorbing up to 10 -3 mmol of a predetermined chemical onto an active film of a chemical micro-reservoir; ii) storing said predetermined chemical on said active film; and iii) heating said film to release said predetermined chemical, wherein said chemical micro-reservoir comprises: i) a substrate comprising a) two opposed major surfaces including a dielectric window region; b) heater means situated on said dielectric window region on one side of side opposed surfaces; and c) a conductivity cell electrode means situated on said dielectric window on the opposite surface from said heater means; and ii) an active film deposited on said surface containing said conductivity cell electrode means.
Claim 2
Independent Claim
119 words
A method for storing a chemical in a chemical micro-reservoir comprising: i) absorbing up to 10 -3 mmol of a predetermined chemical onto an active film of a chemical micro-reservoir; ii) storing said predetermined chemical on said active film; and iii) heating said film to release said predetermined chemical, wherein said chemical micro-reservoir comprises: i) a substrate comprising a) two opposed major surfaces including a dielectric window region; b) heater means situated on said dielectric window region on one side of side opposed surfaces; and c) a conductivity cell electrode means situated on said dielectric window on the opposite surface from said heater means; and ii) an active film deposited on said surface containing said conductivity cell electrode means.
Claim 3
Dependent Claim
19 words
The method of claim 1, wherein said active film has a thickness of from 0.5 nm to 25 nm.
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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) | 1998-01-30 | 1998-08-01 | 1999-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-30 | 2002-08-01 | 2003-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-30 | 2006-08-01 | 2007-01-31 | $7700.00 | Window Closed / Lapsed |