US3485143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction welded internally cooled piston
Assignee: Caterpillar Inc
•
Filing: 1967-10-09
•
Granted: 1969-12-23
•
Expires: 1987-10-09
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Canady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:57
CPC Classifications
F; F02; F02F; F02F3/00; F02F3/16; F02F3/18; F16; F16K; F16K49/00; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0433; F05C2201/0448; F05C2201/046; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1678957A
Cited
US1953109A
Cited
US2537174A
Cited
US2882106A
Cited
US3144710A
Cited
US3273233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |