Patent US3456928A successfully refreshed from Google Patents.
US3456928A
Expired / Lapsed
US
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Combined blast furnace scrubber and dust catcher
Assignee: Chemical Construction Corp
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Filing: 1967-05-24
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Granted: 1969-07-22
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Expires: 1987-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jack J Selway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:12
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S261/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR624542A
Cited
US2006295A
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US2604185A
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US2691423A
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US2731466A
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US2747847A
Cited
US3130024A
Cited
US3222136A
Cited
US3262685A
Cited
US3331591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |