Patent US2554703A successfully refreshed from Google Patents.
US2554703A
Expired / Lapsed
US
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Vacuum still
Assignee: Eastman Kodak Co
•
Filing: 1946-03-21
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Granted: 1951-05-29
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Expires: 1966-03-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C D Hickman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:34
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/228
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US27503A
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US440752A
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US552456A
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US1286315A
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US2220171A
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US2224621A
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US2234166A
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US2385074A
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US2437594A
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US2427718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |