Patent US3740196A successfully refreshed from Google Patents.
US3740196A
Expired / Lapsed
US
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Chemical spot test system
Assignee: United States Department of the Army
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Filing: 1971-03-30
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Granted: 1973-06-19
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Expires: 1991-03-30
Abstract
Abstract AN APPARATUS, MATERIAL, AND METHOD OF PRODUCING THE MATERIAL FOR AN IMPROVED CHEMICAL SPOT TEST SYSTEM, THE INVENTION BEING AN ALUMINIZED PAPER IN THE APPARATUS TO REACT EXOTHERMICALLY WITH A CUCL2 SOLUTION TO GENERATE HEAT TO SENSITIZE A MUSTARD AGENT SPOT TEST.
Inventors
- 👤 H Stroterhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:58
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |