Patent US3525419A successfully refreshed from Google Patents.
US3525419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system
Assignee: TORCA PRODUCTS Inc
•
Filing: 1968-02-07
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Granted: 1970-08-25
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Expires: 1988-02-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Cassel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:17
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/02; F01N1/00; F01N1/02; F01N2490/00; F01N2490/14
Claims Analysis
Total Claims: 0
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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) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |