Patent US2607331A successfully refreshed from Google Patents.
US2607331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cover for valve-in-head motors
Assignee: Individual
•
Filing: 1950-04-22
•
Granted: 1952-08-19
•
Expires: 1970-04-22
Abstract
No abstract record available.
Inventors
- 👤 Charles A Wefing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:30
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/006; F02B; F02B77/00; F02B77/11; F02B77/13; F02B2275/00; F02B2275/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |