Patent US3407575A successfully refreshed from Google Patents.
US3407575A
Expired / Lapsed
US
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Through-flow spark arrester
Assignee: Individual
•
Filing: 1967-12-08
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Granted: 1968-10-29
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Expires: 1987-12-08
Abstract
No abstract record available.
Inventors
- 👤 Krizman John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:32
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/12; B01D45/16; F; F01; F01N; F01N3/00; F01N3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2004468A
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US2569909A
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US2646854A
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US2662610A
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US2659450A
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FR1106384A
Cited
US2866518A
Cited
US3064411A
Cited
US3009539A
Cited
US3216182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |