Patent US3552929A successfully refreshed from Google Patents.
US3552929A
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US
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Assignee: 3M Co
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Filing: 1968-01-23
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Granted: 1971-01-05
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Expires: 1988-01-23
Abstract
Abstract A DEVICE FOR DETECTING HALIDE ION CONCENTRATION IN FLUIDS. THE DEVICE COMPRISES A TRANSPARENT BACKING MATERIAL AND A SUBSTRATE ADHERED THERETO. THE SUBSTRATE IS DIVIDED INTO A PLURALITY OF DISTINCT REGIONS WHICH CONTAIN DIFFERENT, PREDETERMINED AMOUNTS OF HALIDE-SENSITIVE REAGENT.
Inventors
- 👤 Richard P Fields
- 👤 John J Neumayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:45
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/44; A61B5/441; A61B10/00; A61B10/0045; A61B10/0064; G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/84; Y; Y10; Y10T; Y10T436/00; Y10T436/19; Y10T436/193333
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |