US2387971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder liner and cylinder
Assignee: Individual
•
Filing: 1943-01-11
•
Granted: 1945-10-30
•
Expires: 1963-01-11
Abstract
No abstract record available.
Inventors
- 👤 Aspin Frank Metcalf
- 👤 Ellinghouse Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:54
CPC Classifications
F; F16; F16J; F16J10/00; F16J10/02; F16J10/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/4927; Y10T29/49272
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-10-29 | 1949-04-30 | 1949-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-10-29 | 1953-04-30 | 1953-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-10-29 | 1957-04-30 | 1957-10-30 | $7700.00 | Window Closed / Lapsed |