Patent US3459167A successfully refreshed from Google Patents.
US3459167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine
Assignee: Individual
•
Filing: 1968-01-22
•
Granted: 1969-08-05
•
Expires: 1988-01-22
Abstract
No abstract record available.
Inventors
- 👤 Southwick W Briggs
- 👤 Howard W Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:12
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/02; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0418; F05C2201/0424; F05C2251/00; F05C2251/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1975818A
Cited
US2707691A
Cited
US2926649A
Cited
US3203321A
Cited
US2873733A
Cited
US2914048A
Cited
US2978360A
Cited
US3293064A
Cited
US3332752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-04 | 1973-02-03 | 1973-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-04 | 1977-02-03 | 1977-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-04 | 1981-02-03 | 1981-08-05 | $7700.00 | Window Closed / Lapsed |