Patent US1993772A successfully refreshed from Google Patents.
Patent US3511030A successfully refreshed from Google Patents.
US3511030A
Expired / Lapsed
US
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Methods and apparatus for electrostatically cleaning highly compressed gases
Assignee: Research Cottrell Inc
•
Filing: 1967-02-06
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Granted: 1970-05-12
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Expires: 1987-02-06
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Hall
- 👤 Robert F Brown
- 👤 Myron Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:47
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/38; B03C3/66
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA629665A
Cited
US1787955A
Cited
US1908897A
Cited
US2050367A
Cited
US2100155A
Cited
US2264495A
Cited
US2249801A
Cited
FR1055710A
Cited
US2704134A
Cited
US2705544A
Cited
US2730195A
Cited
US2937709A
Cited
US2814360A
Cited
US2867285A
Cited
US2873000A
Cited
US2983332A
Cited
GB882803A
Cited
US3004833A
Cited
US3026964A
Cited
US3054245A
Cited
US3218781A
Cited
US3395193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |