US3497031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust silencer
Assignee: Individual
•
Filing: 1969-02-04
•
Granted: 1970-02-24
•
Expires: 1989-02-04
Abstract
No abstract record available.
Inventors
- 👤 Dennis M Kedziora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:03
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1838; F01N13/1844; F01N13/1855; F01N1/00; F01N1/08; F01N13/1805; F01N13/1833; F01N13/1888; F02; F02B; F02B75/00; F02B75/34; F02B9/00; F02B9/06; F01N2450/00; F01N2450/24; F01N2470/00; F01N2470/10; F01N2470/14; F01N2470/18; Y; Y10; Y10S; Y10S181/00; Y10S181/404; Y10T; Y10T24/00; Y10T24/39; Y10T24/3936; Y10T24/394
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |