US2744211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replaceable catalytic plug for internal combustion engines
Assignee: Transonic Corp
•
Filing: 1952-03-10
•
Granted: 1956-05-01
•
Expires: 1972-03-10
Abstract
No abstract record available.
Inventors
- 👤 Berkman Sophia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:56
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1123017A
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US1230795A
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US1564906A
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US1523454A
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US1522551A
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US1820878A
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US2028749A
Cited
US2128457A
Cited
US2151432A
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US2552555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |