US3487823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite valve seat insert and method of overhaul
Assignee: WALTER J WALKER
•
Filing: 1967-07-31
•
Granted: 1970-01-06
•
Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Carl M Tarter
- 👤 Walter J Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:48
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/22; F01L3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49306
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1709807A
Cited
US1770112A
Cited
US1949613A
Cited
US1949614A
Cited
US1959068A
Cited
US2406963A
Cited
US2424738A
Cited
US2447858A
Cited
US2753859A
Cited
US3115127A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-05 | 1973-07-07 | 1974-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-05 | 1977-07-07 | 1978-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-05 | 1981-07-07 | 1982-01-06 | $7700.00 | Window Closed / Lapsed |