US3440803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas scrubber
Assignee: Chemical Construction Corp
•
Filing: 1967-06-02
•
Granted: 1969-04-29
•
Expires: 1987-06-02
Abstract
No abstract record available.
Inventors
- 👤 Peter M Wechselblatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:14
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/02; B01D47/022; B01D47/027; Y; Y10; Y10S; Y10S261/00; Y10S261/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1822755A
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FR758997A
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US2604185A
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US2627396A
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US2883167A
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US2793709A
Cited
US3112352A
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US3085793A
Cited
US3141910A
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US3168031A
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US3317197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |