Patent US2533089A successfully refreshed from Google Patents.
US2533089A
Expired / Lapsed
US
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Petri dish cover
Assignee: BALTIMORE BIOLOG LAB
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Filing: 1949-04-26
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Granted: 1950-12-05
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Expires: 1969-04-26
Abstract
No abstract record available.
Inventors
- 👤 John H Brewer
- 👤 Theodore J Carski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:41
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/10; C12M23/38
Claims Analysis
Total Claims: 0
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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) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |