Patent US2940360A successfully refreshed from Google Patents.
US2940360A
Expired / Lapsed
US
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Perfusion chamber
Assignee: Individual
•
Filing: 1957-05-23
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Granted: 1960-06-14
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Expires: 1977-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jr William H Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:03
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048128A
Cited
US2265182A
Cited
US2348448A
Cited
FR914827A
Cited
US2644452A
Cited
DE936299C
Cited
US2690695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |