US3422667A
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Method of evaluating the concentration gradients in liquids
Assignee: Czech Academy of Sciences
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Filing: 1966-05-03
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Granted: 1969-01-21
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Expires: 1986-05-03
Abstract
No abstract record available.
Inventors
- 👤 Jiri Hrdina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/62; G01N30/74; G01N21/00; G01N21/84; G01N21/85; G01N35/00; G01N35/08; G01N2030/746
Claims Analysis
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |