Patent US3817839A successfully refreshed from Google Patents.
US3817839A
Expired / Lapsed
US
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Bi-media dip plate
Assignee: Individual
•
Filing: 1971-03-29
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Granted: 1974-06-18
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Expires: 1991-03-29
Abstract
Abstract A BI-MEDIA DIP PLATE FOR USE IN PERFORMING A METHOD OF BACTERIAL QUANTITATION AND DIFFERENTIATION. THE DIP PLATE HAS A RAISED BORDER ON EACH OPPOSED FACE FOR SEPARATING FINITE AREAS OF DEPOSIT FOR CULTURE MEDIA FROM POTENTIAL CONTAMINATNS IN CONTACT WITH THE EDGES OF THE DIP PLATE AND HAS LEGS FOR SPACING THE AREA OF DEPOSIT ABOVE A SUPPORTING SURFACE. THE DIP PLATE IS USED IN COMBINATION WITH A VIAL WHICH MAINTAINS THE DIP PLATE IN A STABLE, ERECT POSITION.
Inventors
- 👤 D Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:28
CPC Classifications
C; C12; C12M; C12M41/00; C12M41/30; C12M41/36
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |