US3458285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing the undesirable decrease of the concentration gradients
Assignee: Czech Academy of Sciences
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Filing: 1966-03-16
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Granted: 1969-07-29
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jiri Hrdina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:52
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/62; G01N30/74; B; B01; B01J; B01J39/00; B01J39/26; G01N30/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3010798A
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US3098717A
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US3074784A
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US3097927A
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US3334969A
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US3341299A
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US3366149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |