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US2484445A
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Rotary drum evaporator with concentric evaporating chambers
Assignee: J Bibby and Sons Ltd
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Filing: 1946-08-15
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Granted: 1949-10-11
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Expires: 1966-08-15
Abstract
No abstract record available.
Inventors
- 👤 Bibby James Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:40
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/22; B01D1/222; B01D1/228; Y; Y10; Y10S; Y10S159/00; Y10S159/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US447210A
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US552456A
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US668162A
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US706087A
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US722636A
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US1308819A
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US1936524A
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US2192089A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |