Patent US3494334A successfully refreshed from Google Patents.
US3494334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine exhaust systems
Assignee: Brunswick Corp
•
Filing: 1968-03-14
•
Granted: 1970-02-10
•
Expires: 1988-03-14
Abstract
No abstract record available.
Inventors
- 👤 Robert T Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:24
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F02; F02B; F02B27/00; F02B27/04; F02B61/00; F02B61/04; F02B61/045; F02F; F02F1/00; F02F1/18; F02F1/22; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1319100A
Cited
US988514A
Cited
US1515523A
Cited
US1834473A
Cited
US2239262A
Cited
US2390913A
Cited
GB571525A
Cited
GB572192A
Cited
US2643510A
Cited
US2729204A
Cited
US2833255A
Cited
US3105474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |