Patent US3216181A successfully refreshed from Google Patents.
US3216181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust system
Assignee: Individual
•
Filing: 1962-07-13
•
Granted: 1965-11-09
•
Expires: 1982-07-13
Abstract
No abstract record available.
Inventors
- 👤 Ivan H Carpenter
- 👤 Arthur J Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:52
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1114876A
Cited
GB189618208A
Cited
US661276A
Cited
US965581A
Cited
US1036713A
Cited
US1401535A
Cited
US1421432A
Cited
US1843999A
Cited
US1664333A
Cited
GB531864A
Cited
US3153682A
Cited
US3072214A
Cited
US3032968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |