US2433447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic cylinder drainage system for internal-combustion engines
Assignee: Caterpillar Inc
•
Filing: 1945-10-05
•
Granted: 1947-12-30
•
Expires: 1965-10-05
Abstract
No abstract record available.
Inventors
- 👤 Ralph J Furstoss
- 👤 Stanley J Kranc
- 👤 Paul V Mcwherter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:26
CPC Classifications
F; F01; F01M; F01M1/00; F01M1/02; F01M11/00; F01M11/04; F01M11/06; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F02B75/222
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2183558A
Cited
US2162259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-29 | 1951-06-30 | 1951-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-29 | 1955-06-30 | 1955-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-29 | 1959-06-30 | 1959-12-30 | $7700.00 | Window Closed / Lapsed |