US3677904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petri dish including a chamber for a sterilized specimen-spreading element and process for using the petri dish
Assignee: Boeing North American Inc
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Filing: 1969-11-20
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Granted: 1972-07-18
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Expires: 1989-11-20
Abstract
Abstract A PETRI DISH IS PROVIDED WITH A SEPARATE CHAMBER FOR A STERILIZED BALL. PRIOR TO USE, AN AGAR LAYER IS DEPOSITED IN THE DISH AND A SPECIMEN SAMPLE, TO BE SPREAD ON THE LAYER, IS PLACED IN THE CHAMBER WITH THE BALL. A MAGNET IS POSITIONED OVER THE CHAMBER FOR PULLING THE BALL COVERED BY A FILM OF THE SPECIMEN FROM THE CHAMBER. THE MAGNET PLACES THE BALL AND SPECIMEN AT A PREDETERMINED LOCATION ON THE AGAR LAYER. THE DISH IS ROTATED RELATIVE TO THE BALL FOR SPREADING THE SPECIMEN IN A NON-OVERLAPPING PATTERN ON THE AGAR SURFACE. AFTERWARDS, THE BALL IS RETURNED TO THE CHAMBER AND THE AGAR IS PROCESSED TO INCUBATE THE MICRO-ORGANISMS OF THE SPECIMEN.
Inventors
- 👤 James E Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:43
CPC Classifications
C; C12; C12M; C12M33/00; C12M23/00; C12M23/02; C12M23/10
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |