US3406500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soot eliminator
Assignee: LE ROY F DEMING
•
Filing: 1965-09-22
•
Granted: 1968-10-22
•
Expires: 1985-09-22
Abstract
No abstract record available.
Inventors
- 👤 Le Roy F Deming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:09
CPC Classifications
F; F23; F23J; F23J11/00; Y; Y10; Y10S; Y10S261/00; Y10S261/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US793110A
Cited
US1447554A
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FR704898A
Cited
GB359739A
Cited
US2213881A
Cited
US2256524A
Cited
US2453593A
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US3064411A
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US3234993A
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US3191364A
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US3336733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |