US3487620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke cleaning apparatus
Assignee: Individual
•
Filing: 1968-02-16
•
Granted: 1970-01-06
•
Expires: 1988-02-16
Abstract
No abstract record available.
Inventors
- 👤 Nicholas Klein
- 👤 Yeshaye Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:46
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/18; F; F23; F23J; F23J15/00; F23J15/02; F23J15/04; Y; Y10; Y10S; Y10S261/00; Y10S261/09; Y10S261/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US758789A
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US1189777A
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US1291840A
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US1673732A
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US1818143A
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US1810410A
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US1983620A
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US2172399A
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US2646263A
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US3336733A
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US3327455A
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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) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |