Patent US2758535A successfully refreshed from Google Patents.
US2758535A
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Electrical precipitation apparatus
Assignee: Research Corp
•
Filing: 1952-06-26
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Granted: 1956-08-14
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Expires: 1972-06-26
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:11
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/08; B05B5/087; A; A23; A23B; A23B4/00; A23B4/044; A23B4/056; Y; Y10; Y10S; Y10S55/00; Y10S55/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA479254A
Cited
US1402203A
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US1483668A
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US1710747A
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US1960516A
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US2047525A
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US2247963A
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GB594564A
Cited
US2585799A
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US2589034A
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US2565454A
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US2576319A
Cited
US2604870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |