US3548591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smog control device
Assignee: WILLIAM H MCKAY
•
Filing: 1968-09-11
•
Granted: 1970-12-22
•
Expires: 1988-09-11
Abstract
No abstract record available.
Inventors
- 👤 William H Mckay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:16
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/04; 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)
US366568A
Cited
US758402A
Cited
US1773053A
Cited
US1883715A
Cited
US2008800A
Cited
US2825424A
Cited
GB808906A
Cited
US3224171A
Cited
US3406501A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |