US2971802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grooved cylinder liner for reduced ring groove wear
Assignee: Caterpillar Inc
•
Filing: 1958-10-02
•
Granted: 1961-02-14
•
Expires: 1978-10-02
Abstract
No abstract record available.
Inventors
- 👤 Robert E Kennemer
- 👤 John A Immel
- 👤 Robert B Cambron
- 👤 James S Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:36
CPC Classifications
F; F16; F16J; F16J9/00; F02; F02F; F02F1/00; F02F1/18; F02F1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1459819A
Cited
US754121A
Cited
US1295329A
Cited
US1778200A
Cited
US1744514A
Cited
US1871820A
Cited
FR1097144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-14 | 1964-08-15 | 1965-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-14 | 1968-08-15 | 1969-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-14 | 1972-08-15 | 1973-02-14 | $7700.00 | Window Closed / Lapsed |