US3009539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark arrester
Assignee: Rockwell-Standard Corp
•
Filing: 1960-03-07
•
Granted: 1961-11-21
•
Expires: 1980-03-07
Abstract
No abstract record available.
Inventors
- 👤 Louis S Papp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:04
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/06; F23; F23J; F23J15/00; F23J15/02; F23J15/022; F23J15/027
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US230568A
Cited
US429347A
Cited
US791517A
Cited
US1215935A
Cited
US1362025A
Cited
US2425588A
Cited
US2664966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |