US2539738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine governor
Assignee: Caterpillar Inc
•
Filing: 1948-10-20
•
Granted: 1951-01-30
•
Expires: 1968-10-20
Abstract
No abstract record available.
Inventors
- 👤 George B Grim
- 👤 Kenneth J Fleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:03
CPC Classifications
F; F02; F02D; F02D1/00; F02D2700/00; F02D2700/02; F02D2700/0269; F02D2700/0282; F02D2700/0284; F02D2700/0292
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2143168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |